Base
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FAQ
Everything about trading on Base, indexed by topic and keyword.
The primary physical infrastructure for Base Exchange is hosted at the Equinix SP6 Data Center. The secondary physical infrastructure is hosted at Ascenty Vinhedo 2.
Base Exchange offers various connectivity options to suit different participant profiles, providing flexibility, security, and high availability when accessing its infrastructure.
The connectivity models are:
With these alternatives, participants can choose the connectivity model that best fits their operational needs, balancing performance, resilience, and ease of integration with the Base Exchange infrastructure.
Yes. The Base Exchange has a dedicated cage at Equinix SP6, located in a data hall exclusive to the Exchange. The exact location of the colocation environment is disclosed to participants in due course. The Base Exchange does not sell physical infrastructure services, such as cages, racks, or power. Colocation services must be contracted directly with Equinix or Ascenty.
Currently, the connection between the Base Exchange and B3 follows the conventional model via telecommunications carriers. The list of certified carriers is released in due course. The provision of dark fiber for participants with a presence in the B3 colocation facility is still under evaluation, and new alternatives are being studied.
There is a section on the Base Exchange website dedicated to all published Official Letters and Announcements. New publications are also sent by email to those who sign up to receive them. These Official Letters and Announcements are part of the transparency rules defined by Base.
Stocks, units, real estate investment funds, and ETFs are available for trading. The list of authorized instruments is published via Market Data and on the Base website.
Base Exchange adopts a standard lot size of 1, so the minimum quantity for trading any instrument is 1.
Not at the moment. The companies traded on Base Exchange are the same as those on the primary listing exchange.
The trading phases are: Connectivity Testing, Pre-opening (cancellation only), Continuous Trading, Closing (MOC orders), and Order Cancellation.
Yes, Base uses a Volatility Control Mechanism (VCM) to regulate price fluctuations.
The VCM is triggered when an order could result in trades outside the trading tunnel. For each instrument or group of instruments, Base sets a volatility percentage and a reference price, creating a dynamic price range. If an order exceeds this range, it is rejected and the instrument enters a five-minute stabilization period, during which the Dynamic Tunnel becomes static, limiting the prices of accepted orders.
In accordance with CVM Resolution No. 134, each intermediary is responsible for defining the procedures and parameters needed to achieve the best possible result for the client when executing orders. Base remains available to help participants develop and define best execution practices.
Base Exchange accepts simple buy and sell orders, limit or market, as well as cross orders. It also accepts MOC (Market on Close) and POC (Passive or Cancel).
A POC is a limit order that is only accepted if it rests in the book as a passive order, waiting for a counterparty. If, when sent, it would execute immediately against an existing order in the book, it is automatically cancelled instead. This ensures the order never acts as an aggressor. It is designed for liquidity-providing algorithms.
Yes. Orders can be valid until a specific date or until cancelled, for a maximum of 1 (one) year.
Yes. Base Exchange accepts Fill or Kill (FOK) and Immediate or Cancel (IOC) orders via the ALO Binary and FIX protocols.
Yes. Base accepts MOC orders. Detailed rules will be announced soon.
No. Trades executed on Base are cleared and settled exclusively through its own post-trade infrastructure. Therefore, buys and sells executed on different exchanges are treated as independent transactions, known as arbitrage trades, and do not qualify as day trades across markets.
Orders can be cancelled through the drop copy supervisory session or through Base's order management platform.
Base accepts the ALO binary protocol, native to its matching engine, as well as FIX 4.4.
Yes. There is a throttle per session (FIX or binary), which sets a maximum number of messages per second. The limits will be published soon.
Our protocols are available on our website so that brokers can assess the adjustments needed. We provide technical support and assistance with questions and custom solutions, ensuring a fast and efficient integration.
The Market Data specification, called ALI Protocol, is already available. The instruments, tickers, and ISINs are the same as those traded on the primary listing exchange. Any consolidation of Market Data between the primary listing exchange and Base is done through vendors that offer this service.
Base provides MBE (Market by Event), which includes all orders, executions, trade cancellations, instrument list, trading status changes, and trading tunnel. It also provides a feed with top of book and trade statistics (high and low prices, traded volume, among others).
The clocks of the trading services are synchronized via PTP. Market Data event timestamps are the same as those of the events generated by the matching engine.
No. Base does not provide a consolidated Market Data feed.
Yes. Drop Copy is available via FIX 4.4. It can be filtered by account, CNPJ (Brazilian company tax ID), and order entry session. It can also be configured to send only trades or all messages.
The order management platform provided by Base lets you filter all order rejections along with their reasons. Rejection details are also included in the messages sent through the Order Entry sessions.
To become a participant, the applicant must:
The available account types and their respective uses are described in the Post-Trade Operational Procedures Manual, which will be released in due course.
The list of participant categories is available for consultation in the “Participants” section of the Base Exchange website.
The available statuses and their respective descriptions are detailed in the Post-Trade Operational Procedures Manual, which will be released in due course.
Data analysis, documentation review, and registration approval may take up to 30 days. Activation depends on the connectivity method used with the Base and the necessary adjustments made by the Participant's technical team.
The available types of links and their respective purposes are described in the Post-Trading Operational Procedures Manual, which will be released in due course.
If access authorization is cancelled, you need to start a new access request process.
The available types are:
Participants must keep their registration details up to date, ensuring that information and documents are updated whenever any changes occur. Base notifies the Participant when a periodic registration review is required, in accordance with regulatory standards.
Base Securities Lending options are divided into public and private categories. The public option allows for the execution of lending transactions using assets available in public books, meaning that both lending and borrowing orders are visible to everyone for execution at will; contracts concluded through this option feature standardized terms for maturity, grace periods, and reversibility. The private option consists of formalizing a transaction with terms defined bilaterally between the parties in a private setting; contracts concluded through this option feature customizable terms for maturity, grace periods, and reversibility.
The Base Securities Lending system is accessed by authorized intermediaries on Base as a Full Trading Participant (PNP) or Settlement Participant (PL) on behalf of their investors.
All stocks, units, real estate investment funds, and ETFs available for trading on Base are eligible for Securities Lending, subject to risk criteria.
The Securities Lending system is available on all days when there is a trading session on Base, which in turn follows the calendar of the exchange where the assets are listed.
The system is available from 8:00 AM to 7:30 PM (BRT). The schedules for submitting orders, closing deals, and other processes at Base Clearing are detailed in the Base Post-Trading Operational Procedures Manual.
The public mode allows for the entry of lending and borrowing orders, which can be either limit or market orders. The private mode allows for the entry of directed and direct orders. Orders are submitted by an intermediary authorized on the Base as a Full Trading Participant (PNP) or Settlement Participant (PL).
For investors who intend to hold their assets, lending provides extra income while ensuring all rights to future earnings are maintained throughout the contract term, along with the security that the assets will be returned at the end of the agreement.
Clearing has lender protection mechanisms in place to ensure the receipt of assets within the contractually agreed timeframe or, in exceptional situations, the financial value corresponding to the transaction. A detailed description of these contingency mechanisms is available in the Base Post-Trade Operational Procedures Manual.
In Securities Lending transactions, shares are temporarily transferred to the borrower's ownership. Consequently, for the duration of the contract, the lender is no longer listed as a shareholder of the company and, therefore, cannot exercise voting rights at shareholder meetings.
In Securities Lending, the lender temporarily transfers formal ownership of the assets to the borrower and, as a result, is no longer listed as a shareholder with the issuing company, meaning they do not directly receive dividends or distributions during the term of the transaction. However, the loan agreement ensures the lender receives an amount equivalent to these distributions on the same date they are paid by the company, subject to applicable tax treatment. To facilitate this, the Base Clearing system credits the lender and simultaneously debits an equal amount from the borrower. When a corporate action involves the distribution of assets, such as stock bonuses, splits, reverse splits, or similar operations, the lender receives the returned assets with quantities adjusted to reflect the impact of the event. In cases where subscription rights arise during the loan term, the system allows the lender to exercise these rights under conditions equivalent to those they would have had if the assets had remained in their possession, adhering to the same deadlines and values established by the company. However, since the lender is not listed as a shareholder during the transaction, subscription rights are not credited directly to their custody account. In this scenario, the borrower is responsible for returning the subscription rights, the corresponding receipts, or the shares resulting from the exercise of those rights. If subscription receipts or new shares are delivered, the costs associated with exercising the subscription remain the responsibility of the lender.
Income earned by the lender in Securities Lending transactions may be subject to Withholding Income Tax (IRRF), depending on the investor category, the term of the transaction, and the country of residence.
The applicable rates are:
Resident investor (individual or legal entity) and investor residing in a country or dependency with favorable taxation ("tax haven"):
Foreign investor: 15%
Financial institution: exempt
For the borrower, there is no Withholding Income Tax on the execution of the lending transaction; only applicable fees and operational costs are due.
For more information on the taxation of Securities Lending transactions, please refer to RFB Normative Instruction No. 1,585.
All Securities Lending contracts are subject to a minimum grace period of 1 business day following the settlement of the trade opening. In private transactions, this period can be negotiated between the parties, whereas in public transactions, the 1-business-day grace period is mandatory. Requests for early settlement can only be made after the contractual grace period has been fulfilled. Furthermore, for a lender to request early settlement, the contract must include a reversibility clause in their favor. In such cases, the borrower has a minimum timeframe to return the assets, which varies depending on the time the lender's intermediary submits the request. When an early settlement request is made by the borrower, the settlement occurs on the business day following the request.
The renewal of Securities Lending agreements depends on the initiative of one of the parties involved, who must submit the request through the intermediary institution responsible for the operation, whether it be a brokerage, distributor, or custodian. For the renewal to be finalized, the counterparty must also agree, and they may accept or decline the request within the timeframes established by Base. Therefore, it is recommended that the parties align beforehand regarding their interest in the renewal to ensure the process is successful.
The possibility of selling assets during the term of the agreement depends on the policies established between the principal and their intermediary. When permitted, the transaction requires the early settlement of the lending agreement, which must occur within the settlement period for the asset sale. It is the sole responsibility of the intermediary institution to process the early settlement request, the sale of the assets, and any other workflows necessary to ensure the proper execution of the transaction.
Yes. All Securities Lending contracts traded on Base are automatically renewed upon maturity by default. Renewal generates a new contract with the same characteristics as the original, ensuring position continuity and avoiding unnecessary liquidations. In the renewed contract, the rate is updated to the average asset rate published by Base, the quantity corresponds to the balance of assets not previously liquidated (if no early liquidation occurred, the quantity remains the same as the previous contract), and the new maturity is set to 21 business days. Furthermore, automatic renewal can be disabled at the time the operation is contracted. If this option was not selected initially, but the parties decide to terminate the contract at maturity, the cancellation of the automatic renewal can be requested up to T-3 before the maturity date. This request can be made by either the lender or the borrower and is subject to the counterparty's approval.
Yes. If the parties wish to renew a contract with terms different from those set out in the automatic renewal, a manual renewal can be performed. In this case, the renewal does not follow the standard parameters and is subject to approval by the participant, the counterparty, the carrying broker (where applicable), and the custodian, in the case of custody routing. The request can be made from the grace period date up to T-3 of the maturity date, provided the established deadlines for this procedure are met. During manual renewal, it is possible to change the quantity of assets (limited to the active balance of the original contract), the lending fee, the maturity date, the grace period date, and the reversibility to the lender. Changes to the maturity date, grace period date, and reversibility to the lender are only permitted for private contracts. Manual renewal is not permitted for contracts taken compulsorily to address delivery failures or for defaulted contracts.
Operations on Base can be contracted with a rate between 0.00001% and 499.99999%.
The system can be accessed via the Base Portal (Base Services Portal), through APIs, or via messaging. Technical specifications for each access method are made available on Tech Base (Base Technical Portal).
Direct orders are private-type orders entered by a participant who identifies both the lending client and the borrowing client at the time of the trade, with both parties under their responsibility. Directed orders also fall under the private category, but are entered by a lending participant and directed to a specific borrowing participant. In this case, the lender and the borrower are under the responsibility of different intermediaries.
A limit order is an order where the participant sets a limit rate for executing transactions. Execution only occurs if there is a counterparty willing to trade at conditions equal to or better than the specified rate; if no counterparty is found, the order is added to the loan order book. A market order, on the other hand, is an order without a defined rate that is executed immediately at the best available market rate at the time of entry for the desired asset, provided a compatible counterparty exists; in this case, if no counterparty is found, the order is cancelled.
Yes, active contracts can be transferred in the following scenarios:
Without a change in the principal:
With a change in the principal:
The transfer always involves the total quantity of active assets and any already provisioned earnings, as the object of the transfer is the contract in its entirety. The transfer of the position may imply the transfer of collateral linked to the position, which must be requested jointly. The transfer is subject to evaluation and approval by the Clearinghouse and the participants involved in the transfer. All details are described in the Base Clearing Post-Trading Operational Procedures Manual.
The descriptions above are for informational purposes only. The complete rules can be found in the Clearing Base Operations Manual.
Voluntary Accelerated Settlement (VAS)
This is the mechanism through which Base anticipates the settlement of eligible spot market transactions from T+2 to T+1. As a result, the buyer can receive the securities and the seller can receive the funds one business day ahead of the standard cycle. This anticipation applies to covered sell positions and requires authorization from both parties.
No. Voluntary Accelerated Settlement is optional and requires authorization from both parties — the buyer and the seller. No participant is forced into early settlement against their will: a Voluntary Accelerated Settlement pair only exists at the intersection of two independent authorizations.
Eligibility originates from the sell side: a short position whose net seller result is allocated and locked in the sell-side coverage portfolio (4409-1). Since the balance is already locked and guaranteed, the delivery of the security is certain by design. Being eligible is a necessary, but not sufficient, condition for Voluntary Accelerated Settlement.
No. Beyond your own eligibility and authorization, there must be sufficient authorized credit on the other side to form the pair. The amount of each security that is actually advanced depends on the Risk module's selection policy. A perfectly eligible and authorized position may not be advanced due to a lack of an authorized counterparty or because of a selection decision.
It consists of two layers. The registration layer is a permanent enrollment: without registration, a participant can never enter Voluntary Accelerated Settlement in any position. The position screen layer operates on top of this: those who are registered are included by default and can restrict individual positions (exclusion by position); those who are not registered can add a position on an ad-hoc basis, just for that day, without creating a permanent enrollment.
No. There is no such thing as a buy-side coverage portfolio. The Voluntary Accelerated Settlement trigger is always the sell-side debit, allocated to the sell-side coverage portfolio (4409-1); the buy-side credit is matched as a counterparty, but it does not trigger eligibility.
At T+0, at the 8:30 PM cutoff, positions eligible for T+1 anticipation are determined following the completion of allocation and custodian validation. The associated risk calculation follows at 9:00 PM. This is the point at which candidates are formed, the Risk policy is applied, and matched pairs are produced.
No. The “Settlement Forecast” and “Cycle Forecast” are conditional projections calculated before the engine runs (e.g., “if advanced, it will be on T+1 on such-and-such date”). The “Settlement Date” is the actual event, recorded after settlement occurs. The forecast should not be interpreted as a guarantee of Voluntary Accelerated Settlement.
Yes. Base also acts as an intermediary between buyers and sellers for the Voluntary Accelerated Settlement product (CCP interposition). Therefore, a seller whose buyer defaults on T+1 is paid in the same way — their counterparty is the Clearing House. A seller is never left unpaid due to a buyer's default.
The failed position is assumed by the Clearing House and follows the standard failure process: rolling over to the next business day following the failure date, followed by a mandatory loan, Base Buy-in, or Cash Close-Out. There is no specific failure engine for Voluntary Accelerated Settlement; the existing failure infrastructure is repurposed.
The descriptions above are for informational purposes only. The complete rules can be found in the Clearing Base Operations Manual.
Securities Settlement
Securities trade settlement occurs on a multilateral net basis: throughout the day, each participant's buy and sell obligations are offset against one another, meaning only the net balance of each security needs to be physically delivered or received. This reduces the movement of securities in custody and lowers operational risk. Securities and cash settlements are coordinated within the settlement windows defined by Base.
Spot trades settle on a T+2 basis, meaning two business days after the transaction. When an obligation is not settled on time, it may be rolled over to the next business day, subject to specific failure handling procedures and a new settlement opportunity.
This means Base does not settle each transaction individually. Before delivery, buy and sell instructions for the same security within a single settlement structure are offset against each other, leaving only the net balance to be delivered or received. This mechanism increases cycle efficiency and reduces the need for custody balances.
Base provides monitoring screens where participants can check the real-time status of their instructions throughout the settlement window, including securities settlement, spot positions, failures, and the status of buy-ins and cash close-outs. Queries are updated automatically as processing progresses.
Yes. Before the window officially closes, you can check a projected settlement result, which indicates which positions are likely to fail and the estimated impact. This allows participants to take proactive measures — such as covering a balance — before the cycle is finalized.
When a participant fails to deliver the required securities by the close of the settlement window, the obligation is classified as a delivery failure. Base automatically triggers a series of mechanisms to resolve it — including offsetting with other positions and a Mandatory Securities Loan — and if settlement is not possible on the same day, the obligation is rolled over to the next business day. If the failure persists, it may be handled through a Base Buy-in or converted into a Cash Close-Out.
When an obligation is not settled by the deadline, it may be rolled over to the next business day, allowing for a new settlement attempt. Obligations that remain in failure at the end of the delivery window on the settlement date are then processed via Buy-in or Cash Close-Out.
Yes. Some situations trigger automatic justifications — for example, when a participant fails to deliver a security because they did not receive the expected security within the same window. Additionally, participants can submit manual justifications within the established deadline, which are then reviewed by Base. An accepted justification may waive or reduce the corresponding penalty.
Base applies a sequence of failure mitigation mechanisms: delivery netting, which matches opposing obligations without moving custody; the settlement algorithm, which leverages balances across different timeframes; and finally, mandatory securities lending, which automatically initiates loans to cover residual failures. Only after these mechanisms are exhausted does a failure proceed to Base Buy-in or Cash Close-Out processing.
Base calculates a reference average price for each settlement structure, weighted by the quantities and prices of the trades involved. This price is used to value failures, calculate Cash Close-Outs, and serve as the basis for the Cash Close-Out, ensuring a single, auditable criterion.
This is a loan automatically triggered by Base to resolve residual delivery failures. In the event of a failure, Base checks the donor offers available in the public securities lending book and executes the necessary transactions to cover the shortfall, allowing settlement to be completed. This is a last-resort mechanism, applied only after all other mitigation measures have been exhausted.
The Base Buy-in is the mechanism through which Base acquires securities in the market that a participant failed to deliver, in order to fulfill the obligation to the party entitled to receive them. The purchase is executed based on specific offers, and the corresponding cost is charged to the participant who defaulted.
When security delivery is not possible — for example, due to a lack of offers for the Base Buy-in — the obligation may be settled in cash: the participant who was to receive the securities receives the cash equivalent, calculated based on a reference price defined by Base. This process is known as Cash Close-Out.
Assets held as collateral may be used in the settlement process, in accordance with specific rules and subject to authorization by the Base Collateral module. Collateral helps reduce the risk of failure and is factored into the cycle's clearing mechanisms.
Yes, in specific risk situations. If there is a risk of a participant defaulting, Base may preventively restrict the delivery of securities to them in a controlled and traceable manner until the risk is resolved. If the risk is not resolved by the cycle's cutoff time, the securities are directed to a restricted account instead of the participant's account.
Penalties are available for consultation on Base's own monitor, including details of the failure, the amount, and the calculation basis. Participants are notified of relevant events via screen and messaging, allowing them to track the complete lifecycle of each occurrence.
Yes. Delivery failures are subject to a penalty applied to the undelivered quantity, and there is also a penalty for late cash settlement. The percentages and limits are progressive based on the situation and the time taken to rectify the issue, and they are detailed in the Base Post-Trade Operational Procedures Manual.
Yes. Additional fines may be appealed through a reconsideration request, which must be submitted within the timeframe indicated in the monitor itself. The request is reviewed by Base,which may either uphold or overturn the fine. Minimum fines, which are of a lower value, are not eligible for reconsideration.
The descriptions above are for informational purposes only. The complete rules can be found in the Clearing Base Operations Manual.
Cash Settlement
This is the process that transforms the clearing result into cash obligations: each participant receives or pays the net amount generated by consolidating their operations. Base consolidates the day's financial events, calculates this net position, and forwards it for settlement within the Brazilian Payments System (SPB). It does not replace the official settlement system — it prepares, validates, and provides traceability for the amounts that will be effectively settled.
Base uses the Deferred Net Settlement (DNS) model, a multilateral clearing method within the Brazilian Payments System (SPB). It is “deferred” because funds are transferred at a specific time at the end of the payment cycle rather than in real time, and “net” because the day's cleared balance is transferred instead of each individual transaction. All of this takes place within the Central Bank of Brazil's operational windows. The order is fixed: the position is consolidated first, then settled — no settlement occurs before the day's clearing is closed.
No. Multilateral settlement entries make up the Multilateral Settlement System (MSS) and are settled within the clearinghouse cycle. Conversely, non-multilateral settlements — such as certain collateral movements outside the netting cycle and direct settlements that bypass the clearing process — are not part of the MSS and are settled through their own workflows, during STR (Reserves Transfer System) operating hours where applicable. Both are monitored and tracked, but they follow separate channels.
Through multilateral netting based on financial entries. Each daily event — purchases and sales, securities settlement, securities lending, collateral, penalties and charges, failures, and Cash Close-Outs — generates a debit or credit entry. All are consolidated into the Multilateral Net Balance (MNB), calculated per participant, resulting in a single amount to be paid or received, rather than multiple individual settlements.
The MSS is calculated in two stages, in accordance with the operational schedule cut-off times. The Provisional MSS is calculated throughout the window while entries are still being received, serving to monitor and prepare for settlement. The Final MSS is consolidated after the cut-off time, once all valid entries for the day have been processed. Based on the MSS, Base generates the settlement messages — the Provisional LDL and Definitive LDL — which are sent to the SPB; the final version serves as the basis for the actual settlement.
To provide cash flow predictability. The Provisional LDL0001 — a settlement advice message transmitted via STR — anticipates the estimated multilateral net balance to the Clearing Member before the final version is sent. This allows the CM to know in advance how much they need to have available to settle within the window and to coordinate with their Settlement Bank. The final amount is the one stated in the Definitive LDL0001.
Once the settlement message is sent, the SPB returns a processing confirmation — and only then is your position marked as settled. If a message is rejected, it is resubmitted or handled manually until it is resolved. The entire cycle of sending, returning, and status updates is recorded.
The entire cycle is traceable. Every event — entry, calculation, submission, return, and status — is logged, with an audit trail of values and result versions, and a link between the reversing entry and the original entry via reference code. Results are made available in a structured format to Base and participants, allowing for verification and reconstruction of the position.
When the system identifies an inconsistency, a pending approval, or a discrepancy in a position, it is blocked and will not proceed to settlement until it is resolved — without stalling the processing for other participants. The case can be reprocessed, always subject to the necessary approvals and audit logs.
Base maintains a contingency plan to ensure settlement continuity even in the event of infrastructure failures or disruptions in communication channels with the Central Bank. In such scenarios, settlement proceeds via alternative means in accordance with Central Bank regulations, ensuring traceability and preventing message duplication; participants are notified when contingency mode is activated. Once operations normalize, events processed during contingency are synchronized with the primary environment.
Within the window, your position remains pending or awaiting settlement; once the full amount is received, it is settled (a partial payment is recorded as such). If the cutoff time for the schedule is exceeded without payment, the participant enters a state of arrears, which may result in a late payment penalty—typically included in the following day's multilateral cycle—and a requirement for a formal justification. In cases of prolonged arrears without resolution, a declaration of default may be issued. Once the situation is resolved, the status returns to normal.
The descriptions above are for informational purposes only. The complete rules can be found in the Clearing Base Operations Manual.
Failure Positions
This refers to an obligation to deliver securities that remains unfulfilled by the 12:00 PM official settlement window cutoff. When a participant fails to deliver the required securities within this window, the remaining balance is classified as a failure and becomes subject to specific procedures. This classification applies to both T+0 and T+1 settlement, depending on the stage of the cycle.
This is the record created by the Clearing House to track a failure until its resolution. At the end of the official window, for every regular-way instruction that remains unsettled, the system generates — within the same event — the corresponding rollover instruction and its associated failure position. The position replicates the weighted-average price of the original instruction and tracks the rollover until it is settled or fails again on T+1 of the failure. There is one failure position for each unsettled instruction.
Base applies window mitigation mechanisms in sequence: netting between eligible instructions, which matches opposing obligations without moving custody; non-settlement and delivery optimization algorithms, which leverage balances across different types and maturities; and mandatory security lending, triggered for residual failures. A failure is only officially recorded once these mechanisms have been exhausted.
No. The instruction that attempts to settle again is the rollover instruction — a separate instruction from the original, generated at the end of the official window during the same event that creates the fail position, which will attempt to settle during the T+1 window following the fail. The fail position is not rolled over: it is created at that moment, associated with the rollover, and remains linked to it. During the T+1 window, the rollover instruction goes through clearing, non-settlement and optimization algorithms, and a second attempt at a mandatory loan once again.
Yes. Before the 12:00 PM window execution, the Failure Forecast screen provides the custodian with a preliminary settlement result: the projected net result by structure, the netting effect, the quantity still pending effective balance, and the estimated cash impact of the failures. This allows for proactive action — such as covering a balance — before the cycle is definitively consolidated.
At the end of the full T+1 settlement failure window, if the rollover instruction remains unsettled, the associated failed position is subject to the Buy-in Mechanism, Transfer, and Cash Close-Out process. The central counterparty acquires the missing securities in the market, distributes the acquired balance to the creditors, and converts any undeliverable securities into their cash equivalent. Further details can be found in the Buy-in Mechanism, Transfer, and Cash Close-Out Positions FAQ.
Yes. Through the CCP's interposition, the Clearing House acts as the buyer to the seller and the seller to the buyer. Therefore, those entitled to receive securities will still receive them, even if the original counterparty has defaulted — the defaulted position is assumed by the Clearing House. There is no such thing as a “stranded” creditor participant in the event of a default.
The Failed Positions screen is a query interface that displays one row per position by Settlement Date, including identifiers, nature, settlement structure, quantity, weighted-average price, and cash volume. It is strictly for viewing and exporting data, and each participant can only see their own side. It shows what is in transit for settlement on the day after the failure (T+1), prior to any potential conversion into a Buy-in Mechanism, Transfer, or Cash Close-Out.
The descriptions above are for informational purposes only. The complete rules can be found in the Clearing Base Operations Manual.
Failure Forecast
This is a decision-support screen for the custodian that provides a pre-settlement result after final client allocation and before the official 12:00 PM window. It identifies which delivery obligations are likely to remain outstanding after netting and estimates the potential impact. It functions as an early simulation of the window's logic, allowing for proactive action before the cycle is finalized.
No. It is a projection, not a promise. The final result is only determined during the official 12:00 PM window — specifically because the outcome of the credits depends on the non-settlement algorithm, which only runs during that window and cannot be anticipated. The screen exists to guide action before the closing, not to guarantee an outcome.
Only settlement structures with a debit pre-result — that is, delivery obligations at risk. This screen is not a complete view of the settlement cycle; it is a tool designed to identify and proactively address potential shortfalls. Structures with a credit result, structurally covered instructions, and uncompensated credits are, by definition, out of scope.
This is a structural exclusion, not a display limitation. Knowing which credits will actually be settled depends on the execution of the non-settlement algorithm during the official window — a step that cannot be performed in advance. Since this outcome does not exist before the window opens, uncompensated credits are not displayed.
By settlement structure — the combination of Clearing Member, PNP/PL (PNP – Full Trading Participant; PL – Settlement Participant), custodian, custodian account, ISIN, and distribution. Each aggregated row represents a pre-result by structure, and the drill-down reveals the composition instruction by instruction, showing what has been cleared and what remains as a settlement requirement.
Offsetting only occurs between regular-term instructions of opposite natures within the same structure and in portfolios that offset that side. The collateral balance (4390-7) is consumed before the free portfolio (4101-7) to release the collateral first, as it is the more expensive resource. Loan coverage and covered call portfolios do not offset, and rollovers never offset — each appears as a separate line item.
A rollover is a delivery obligation resulting from a previous failure at its final settlement opportunity. It is excluded from netting and is always displayed separately. Because it represents the most critical scenario — as failure to settle ends the cycle and triggers a Base Buy-in Mechanism and Cash Close-Out — it is given top priority for balance consumption.
These are instructions that do not depend on additional liquidity and do not result in a failure, which is why they are excluded from the screen. This applies to Voluntary Accelerated Settlement debits for positions in covered position portfolios and loans in hedging portfolios, which already have pre-established coverage.
The projection follows the order of obligation criticality: first the rollover (last opportunity, triggers buy-in/close-out if it fails), then the loan (highest sensitivity for the chain of lenders and borrowers), and finally the spot market (regular term, no history of failure). This order is distinct from the non-settlement algorithm hierarchy.
No. The Failure Forecast does not execute the use of collateral — it merely highlights insufficient funds and indicates the existence of collateral when the instruction is already allocated to that portfolio. Actual usage depends on available funds, authorization from the risk system, and compatibility between the operation's PNP/PL and the assets provided as collateral. The screen can even signal when the use of collateral is likely to be denied due to eligibility issues.
Take action before the cutoff: cover a balance, switch the instruction wallet on the security settlement screen, or request a margin transfer between PNPs/PLs. Once the action is taken, the Forecast reflects the change in real time and recalculates the projected result, allowing you to immediately verify whether the at-risk obligation has been addressed.
The descriptions above are for informational purposes only. The complete rules can be found in the Clearing Base Operations Manual.
SECURITY DELIVERY RESTRICTION
It is the mechanism by which an authorized entity holds, in a controlled and traceable manner, the delivery of securities that a participant is due to receive (a security credit). The security is neither discarded nor lost: it remains held while the restriction is in effect and flows back into the client's account as soon as the restriction is released, within the cycle's timeframes.
Four entities: the Clearing House, the Clearing Member (CM), the PNP/PL, and the Custodian. Each restriction is linked to the entity that applied it, and the sum of all restrictions on a single instruction can never exceed the total credit amount.
No. It can be total or partial regarding the credit in securities. An instruction can have both a restricted portion and a free portion at the same time — and restrictions from different entities can coexist on the same instruction. The system continuously recalculates the total restricted amount, the amount still available for new restrictions, and the amount free for settlement.
This is an exceptional restriction: when the Clearing House applies it, it requires manual confirmation and operates on the total quantity of the instruction. It is a tool the Clearing House uses in specific risk situations — such as the risk of a participant defaulting — to preventively restrict delivery until the risk is resolved.
Before the 4:30 PM DvP settlement, the instruction with active restrictions is split into derivatives: one for each active restriction and one for the unrestricted portion, the sum of which equals the original quantity. The unrestricted portion proceeds to client delivery in the DvP; the restricted portions remain held, each linked to the entity responsible for it.
Each entity can only release the restrictions it has applied itself. There is a time window: after 4:30 PM, the system does not accept new restrictions or additional fractional releases — only the release of restrictions that were already registered. Once a restriction is released within the deadline, the corresponding portion becomes available for delivery to the customer again.
At the 6:30 PM cutoff, any portion that remains restricted is settled into the responsible entity's restriction account — rather than the end customer's account. This ensures the security is preserved and managed in a controlled manner, instead of being released while the restriction is still in effect.
Yes. When viewing an instruction, you can see the complete history of restrictions, releases, changes, and routing, along with the individuals responsible for each action. This provides a full audit trail of everything that was held, by whom, when, and the final outcome.
The descriptions above are for informational purposes only. The complete rules can be found in the Clearing Base Operations Manual.
BASE BUY-IN, TRANSFER, AND CASH CLOSE-OUT POSITIONS
They arise on T+1 of the failure. When a rollover instruction does not settle by the end of the full official window — clearing, non-settlement and optimization algorithms, and the second mandatory loan attempt — the failure position generated on T+0 transforms into these three positions. Base executes the Base Buy-in Mechanism, distributes the balance obtained via Transfer, and forwards the remaining amount to Cash Close-Out.
Because they describe sequential stages of the same process. The Base Buy-in Mechanism is the transaction that brings securities into the system; the Transfer distributes this balance to creditors; and the Cash Close-Out settles in cash what the Buy-in Mechanism did not cover. A single query, across three linked tabs, tracks every transaction failure through to the final outcome for each creditor.
Always in the same sequence, within the execution of the T+1 failure window: official window → Base Buy-in Mechanism → Transfer (distribution of the balance, from the smallest credit to the largest) → pre-selection of residual pairs → Cash Close-Out. Pre-selection of the pairs is a precondition for the Cash Close-Out price, which only exists once the pairs have been established.
This is the mechanism through which Base acquires securities in the market that a participant failed to deliver, in order to fulfill the obligation to the party entitled to receive them. The purchase is formed from the Base Buy-in Mechanism order book, between the offer sellers and the outstanding rollover debits — which are the buyers. It serves as the security backing for all other positions.
The offer trade has a single price, applied equally to both sides — the seller of the offer and the buyer (the missing rollover debit). The cash volume of each line is the executed quantity multiplied by this single price.
This is the distribution of the balance earned from the Buy-in Mechanism to rollover credits that were not fulfilled within the window. A rollover debit is distributed to one or more credits, from the smallest to the largest, with partial fulfillment allowed. The security is passed on to the creditor at the weighted-average price inherited from the rollover credit itself that was fulfilled.
When delivery in securities is not possible — for example, due to insufficient balance in the Buy-in Mechanism — the residual obligation is settled in cash: the creditor receives the cash equivalent. Before pricing, the system pre-selects the pairs (debit × rollover credit); the Cash Close-Out price is then the highest value among the rollover debit weighted-average price, the rollover credit weighted-average price, and the previous closing price.
The defaulting participant. In a Buy-in Mechanism, they bear the net difference between the single transaction price and the credit's weighted-average price. In a Cash Close-Out, they bear the difference between the Cash Close-Out price and the credit's weighted-average price. In both cases, the creditor is covered by this spread, preserving the value to which they were entitled.
No. Each position only addresses the unsettled portion of the rollover instruction — the residual — never the original trade quantity.
Through the linked identifiers of the three tabs. The Buy-in Mechanism identifier is the root; the Transfer identifier refers back to the Buy-in Mechanism identifier that generated the balance; the Cash Close-Out identifier refers to the identifier of the unfulfilled rollover instruction. The chain provides a complete audit trail — from the rollover instruction to the buy-in trade, to the transfer that distributed the balance, and, for any remainder, to the Cash Close-Out.
No. The Base Buy-in Mechanism, Transfer, and Cash Close-Out Positions screen is for viewing purposes only: participants can view and export data, but cannot edit, approve, reject, or otherwise intervene in the displayed positions.
The descriptions above are for informational purposes only. The complete rules can be found in the Clearing Base Operations Manual.
Delivery Failure, Justification, and Penalty Monitor
This is the tool where participants track, justify, and contest penalties for delivery failures — it is not where you view the lifecycle of a failure position, which is located on the Failure Positions screen. In the Monitor, the PNP/PL can view T+0 and T+1 settlement failures, receive automatic justifications, submit manual justifications, track the central counterparty's analysis, and file requests for reconsideration — all with a complete audit trail.
The PNP/PL only sees its own ILAs and failures, and can consult them, submit manual justifications, and request reconsideration. The Base analyst sees the ILAs with pending manual justifications and can approve or reject them, classifying the failure. The Base manager has a complete overview, including parameter configuration, indicators, and consolidated history.
There are four. The minimum fine (T+0 and T+1) is 0.5%, with a cap of BRL 50,000 per debit ILA and per window. Additional fines apply only to failures classified as non-operational: 0.5% with no cap on T+0 and 4.5% with no cap on T+1. There is also a 5% recurring fine with no cap for repeat offenses. Minimum fines are charged during the execution of the 12:00 PM windows; additional and recurring fines are charged in the cash multilateral settlement on subsequent days.
This is the 0.5% fine (capped at BRL 50,000) applied during the 12 PM final settlement window execution on the failed balance not covered by automatic justifications. The cap applies per debit ILA and per window. Therefore, a rolled-over failure is charged twice: on T+0 for the original ILA and on T+1 for the rollover ILA — these are distinct ILAs, each with its own cap. The minimum fine is not subject to reconsideration.
This is a 5% fine (uncapped) applied when the same CPF/CNPJ receives an additional T+1 fine more than once within 180 days — a rolling, configurable period that resets with each confirmed charge. This record is agnostic to the PNP/PL: it applies to any participant through which the client operates. If the additional T+1 fine is not charged because the justification was accepted, no recurrence is recorded.
No action is required. The system applies them within the 12 PM final settlement window, before charging the minimum fine. There are three non-exclusive types: third-party T+0 (you did not receive the expected amount for the same security from T-1 to T-5), T+1 delivery (you delivered part of what was missing from T+0 on T+1), and third-party T+1 (you had credit to receive in the same window but did not receive it). Each one exempts the corresponding proportion and comes with a statement of the unreceived credits as evidence.
After the 12:00 PM window on T+1, a period from T+1 to T+3 opens for the PNP/PL to submit a manual justification via the Monitor for any balance not covered by the automated processes, including the evidence requested by Base. There are specific templates for situations such as allocation errors, ETF arbitrage, and market making. Base analyst reviews the submission by T+5 and classifies the failure as operational or non-operational.
This determines the charging of additional fines. If the failure is classified as operational — and the justification is accepted — the additional fines are not charged in proportion to the justification provided. If it is classified as non-operational — meaning the justification was rejected or missing — the additional fines are charged. Minimum fines, which are already charged during the 12 PM final settlement window, are not affected by this classification.
If no manual justification is submitted by T+3, the failure is automatically classified as non-operational on T+4, and the additional fines for T+0 and T+1 are charged on that day. If you have submitted a justification, it will be reviewed: if the analyst does not reach a decision by the end of T+5, the system classifies the failure as operational and the additional fines are not charged.
Yes, but only for additional fines — T+0, T+1, and recurrence. Minimum fines are not eligible for reconsideration. Requests are submitted via the context menu (right-click) on the ILA row in the Monitor grid, within one business day of the charge (by T+5 or T+7, as applicable).
If the T+1 additional fine that created or updated your recurrence record is reversed due to an accepted request for reconsideration, the recurrence record reverts to the last valid occurrence — the last confirmed and non-reversed T+1 additional fine charge. In other words, the reversal restores the count to the correct state.
The descriptions above are for informational purposes only. The complete rules can be found in the Clearing Base Operations Manual.
Yes. Base's pre-trade risk system features both instrument-level and global metrics, allowing for risk monitoring and control across different levels of exposure.
The platform provides the following metrics:
By instrument:
Global metrics:
Protected Mode:
Other restrictions:
The SPCI, SPVI, SDP, and SPVD metrics account for open orders. The TMOC and TMOV metrics are evaluated with every new order submitted. The SFD metric, however, is only affected by executed trades.
When a real-time metric (SPCI, SPVI, TMOC, and TMOV) reaches its configured limit, the order is automatically rejected. When a near-time metric (SDP, SPVD, and SFD) is breached, the entity enters Protected Mode and the order that caused the violation is canceled, provided it has not yet been executed. In the case of the Day Trade Financial Balance (SFD) metric, in addition to entering Protected Mode, all of the entity's open orders are canceled.
When an entity (account or document) violates a limit evaluated outside the order's critical path, it automatically enters Protected Mode, allowing only the reduction of open positions for the day. It is also possible to manually activate: Protected Mode, allowing only the reduction of open positions for the day; or Blocked Mode, completely preventing the entry of new orders.
When an entity enters Protected Mode, the SPI metric is activated to monitor position inventory. The TMOC and TMOV metrics continue to be evaluated as normal. Other metrics remain updated, but new violations do not trigger additional actions.
Initially, there is not a detailed breakdown of aggregated metric consumption. However, this feature is already on Base's roadmap for future updates.
Yes. Historical intraday consumption is available via the portal and API. For previous periods, the maximum recorded consumption for each metric is provided.
Yes. There are maximum limits set by the Exchange. Requests for increases can be made via the portal, email, or phone.
Yes. The carrying firm can assign limits to the executor for pass-through relationships. The executor, in turn, can assign limits to the intermediary for "By Order and Account" relationships.
Yes. Limits can be viewed and exported both through the portal and via API.
Yes. All limit management screens feature file import and export functionality.
The SPCI, SPVI, TMOC, and TMOV metrics are evaluated on the critical path in real-time. The SDP, SPVD, and SFD metrics are evaluated in near-time, once the order enters the matching engine. For cross orders, all metrics are evaluated in real-time.
Limits can be assigned at the Account, Investor, and Trader levels. For "By Account and Order" relationships, it is also possible to assign global metrics aggregated at the intermediary level.
Yes. Profiles are used to facilitate the bulk assignment of limits, while maintaining the ability to create exceptions directly at the entity or instrument level.
Between a limit assigned to a profile and a specific limit assigned directly to an entity or instrument, the specific limit always prevails. When limits are assigned at different levels, the most restrictive limit prevails.
Yes. It is possible to set limits by instrument group using the Authorized Market (MKTA) concept. The classification methodology will be published soon.
The platform provides a Consumption Ranking accessible via portal and API, allowing for real-time monitoring of the usage levels of the limits assigned to entities.
The platform provides audit reports via portal and API, allowing you to track changes made by authorized users, including modifications to limits, profiles, blocks, configurations, and other relevant events.
Base provides a residual risk report calculated based on the stressed economic capacity of the participant's chain. The full methodology will be published soon, and the expectation is that the calculation details will be available directly on the pre-trade portal.
No. Metrics start at zero at the beginning of each trading session. The only exception is when an entity has open GTC (Good 'Til Canceled) orders, which continue to be included in the calculations.
By default, new accounts can inherit the settings previously defined for the investor or the structure to which they belong. This allows the account to begin operations with the applicable limits and restrictions already in place, reducing the need for additional manual configuration.
New investors and traders are automatically associated with the default profile provided by the Base and configurable by each institution. This ensures that the entity is created with the limits, permissions, and restrictions defined in the institution's standard profile, allowing it to begin operations in accordance with pre-established rules.
Yes. Protected Mode is designed to help reduce an entity's risk. Therefore, canceling existing orders remains permitted, as does submitting orders that result in a reduction of position.
Yes. Rejection messages identify the source of the restriction, allowing the user to understand whether the rejection was caused by a limit associated with the executor, carrying broker, intermediary, or the monitored entity itself.
Once negotiated, the operation starts the Base Clearing post-trade journey, which includes the stages of Acceptance, Allocation, Give-up, Position formation, and Settlement. During these stages, the trade is validated, its final beneficiary is identified, and it is managed by the Clearinghouse until it is ready for clearing and settlement.
When the Base accepts a trade, the Clearinghouse acts as the Central Counterparty (CCP): it becomes the buyer to the seller and the seller to the buyer. As a result, each participant has the Clearinghouse itself as their counterparty, which eliminates credit risk between the parties and guarantees the fulfillment of settlement obligations.
Acceptance is the moment the Clearinghouse verifies that a trade meets the criteria to enter the clearing and settlement cycle. Once accepted, the trade gives rise to two independent operations — one buying and one selling — and is managed by the Clearinghouse. From the moment of Acceptance, the transaction becomes irrevocable and irreversible, subject to the exceptions provided for in the Base Regulation.
Operations are never discarded. If no account is specified, the operation is routed to the Capture Account, allowing for subsequent reconciliation during the Allocation process. If the specified account is invalid, it is routed to the Error Account, ensuring full traceability. In both cases, the system applies appropriate operational handling, maintaining complete control and auditability.
Allocation is the stage where the final beneficiary of the trade is identified and the operational details used for settlement are defined, such as the account, the sub account, and, where applicable, the quantity. At the end of the process, the operation must be correctly directed to the client's Normal Account.
These are operational accounts used as an intermediary step in the flow, prior to the final settlement in the client's account. They include Master, Intermediary, Admincon, Capture, Brokerage, and Market Maker accounts, each serving a specific purpose. None of these replace the Normal Account: ultimately, the operation must always be directed to its rightful holder.
These are exception handling accounts with distinct purposes. The Error Account receives operations resulting from non-compliance with allocation rules, such as missed deadlines. The Operational Error Account receives trades resulting from system failures or downtime. The rules for each are outlined in the Base Post-Trade Operational Procedures Manual.
A Give-up is the transfer, between participants, of the responsibility for risk management and the settlement of an operation. Unlike Allocation, a Give-up does not change the owner of the transaction: it changes who is responsible for it to the Clearinghouse.
A give-up can only take place when a give-up link has already been registered between the involved participants. Without this link, the transaction cannot be given up.
Once referred, the Destination Participant may expressly accept or reject the referral, where permitted by the rules. Tacit acceptance may also occur if the destination does not respond within the specified timeframe, in which case the give-up is automatically confirmed, as per the Base Post-Trade Operational Procedures Manual. If not accepted, responsibility reverts to the originating participant.
The Base provides for two modalities: Brokerage Give-up, which involves a link between the originating and destination participants; and Tri-Party Give-up, which also includes the investor in the link. The concept of transferring responsibility is the same for both; what changes are the links between the participants.
Yes. Market Maker and DMA Session operations cannot be rejected by the Destination Participant, which preserves the specific characteristics of these operating models. If rejection is necessary in these cases, the request is analyzed by the Clearinghouse.
A give-up is always originated by a Full Trading Participant (PNP). The destination can be either a Full Trading Participant (PNP) or a Settlement Participant (PL).
All processes take place within defined operational windows, which make up the Base Clearing Schedule and are executed in real time. Detailed schedules for acceptance, allocation, and give-up are described in the Base Post-Trade Operational Procedures Manual.
The Base generates real-time operational events and makes them available through various channels: immediate screen updates, monitoring dashboards, APIs, messages, and files for the involved participants. This way, tracking does not rely on manual queries.
When an operational rule is not followed — such as a late indication or allocation, or a change in ownership as outlined in the Base Post-Trade Operational Procedures Manual — the system automatically identifies the occurrence and makes it available for correction. The participant enters the justification directly into the system, eliminating the need for separate signed documents, and every step is recorded to create a complete audit trail.
No. All processing is handled within the system, in accordance with the authorization levels and permissions defined by the Base. The justification is recorded electronically, and the audit trail — including the user, date, and time — serves as the official record of the event.
The descriptions above are for informational purposes only. The complete rules are available in the Base Clearing Operations Manual.
Base Clearing accepts local currency, federal government bonds, variable income assets, and bank letters of credit, subject to the applicable operational purposes and the eligibility requirements for each.
Collateral deposits can be made through the systems provided by Base Clearing, via the portal or messaging services, in accordance with the operating hours and procedures applicable to each asset type.
Yes. The schedules for collateral movement and processing are published in the Post-Trading Operating Procedures Manual and the Risk Manual.
Not necessarily. The Clearing House may apply specific valuation criteria for each type of collateral, taking into account factors such as liquidity, volatility, the portfolio's credit risk, and the purpose for which the collateral was deposited.
Participants can view information regarding deposited collateral, transactions, releases, and any outstanding issues through the Base Clearing system interface, API, or via messaging services.
Yes. Base Clearing may accept various federal government bonds, provided they meet the eligibility criteria outlined in its risk manual.
No. Only stocks considered eligible by Base Clearing may be used as collateral. You can check the eligibility criteria in the Base Clearing risk manual.
Yes. Base Clearing accepts bank letters of credit issued in both physical and digital formats, offering operational flexibility to participants.
No. Both can be used as collateral, provided they meet the acceptance and validation requirements defined by Base Clearing and described in the risk manual.
Digital bank letters of credit are submitted and validated electronically, in accordance with the operational procedures established by Base Clearing and the issuing institution.
Yes. Collateral may be substituted, provided that the assets presented meet the criteria defined by Base Clearing and maintain the required coverage.
The Safeguard Structure consists of the mechanisms, resources, and procedures used by Base Clearing to address default events and contribute to market security.
Yes. Base Clearing has a Settlement Fund that is part of its Safeguard Structure. Base Clearing and Clearing Members must provide collateral in local currency and/or federal government bonds, as established in the Clearinghouse's regulations.
An Operational Debtor is a participant who experiences a payment failure due to a duly proven operational contingency, with the expectation that it will be resolved within the same day. Default, on the other hand, occurs when a financial obligation is not met according to the terms established by Base Clearing, or when the conditions that define an Operational Debtor status are no longer met.
Yes. The collateral deposited by the defaulting participant may be used in accordance with the procedures set forth in the Base Clearing regulations.
The Clearing House follows specific procedures to manage default events, aiming to preserve operational continuity and market stability.
The Clearing House may take the measures provided for in its regulations to manage, close out, or transfer the defaulting participant's positions.
As a central counterparty, the Clearing House maintains protection mechanisms and a robust Safeguard Structure designed to ensure the rights of performing participants and prevent the impact of default events on other performing market participants.
The Base Clearing methodology aims to reflect the effective cost of closing out positions and collateral under stress conditions, accounting for factors such as market risk and liquidity, as well as cash flow mismatches over the close-out horizon, by calculating metrics that quantify permanent and transitory economic impacts.
The methodology combines historical scenarios, quantitative models, and prospective scenarios, allowing for the capture of both observed and projected events. Prospective scenarios evaluate potential correlation breakdowns, always prioritizing plausibility.
Base Clearing provides for two forms of collateralization for spot market positions:
Yes. Base Clearing includes the NAC calculation module, which covers trades that have not yet been allocated to a final investor account. Until allocation occurs, the risk remains associated with the responsible Full Trading Participant (PNP) or Clearing Participant (PL).
Unallocated trades are processed through the NAC calculation module and consume the Operating Balance Expansion of the responsible Full Trading Participant (PNP) or Clearing Participant (PL) throughout the trading session. If they remain unallocated at the end of the day, they may also impact their margin call.
No. Proprietary positions held by Trading Participants, Full Trading Participants, Settlement Participants, and Clearing Members must be collateralized by the account holder themselves and are treated within the risk framework as Operational Collateral (OP module).
No. Investors belonging to the same economic group as the participant must have their positions collateralized by the investor themselves, and are handled within the context of Operational Collateral (OP module).
Base establishes open position concentration limits per asset at the level of the investor, investor group, participant, and market. When a position at any level of aggregation exceeds the established limit, Base triggers the procedures set forth in the Risk Manual to prevent a single agent from accumulating a position large enough to destabilize the market.
Risk calculations are updated periodically throughout the day to monitor changes in participant exposures and enable timely risk management actions.
The Intraday Risk Limit (IRL) is the risk exposure value permitted by Base Clearing for each Participant without the need for collateralization during the day. This limit is used solely for intraday monitoring of operations and, in conjunction with the collateral provided to increase the operational balance, defines the participant's available operational capacity.
Limits are based on factors related to the participants' financial capacity, liquidity, operational profile, and history of risk exposure.
The Operational Balance represents a Participant's available operational capacity to take on new intraday exposures. It is calculated as the difference between the Intraday Risk Limit, plus any collateral provided to increase that limit, and the Intraday Risk effectively calculated by the Clearing House.
Yes. Base provides tools for continuous monitoring of the Operating Balance and the exposures associated with the participant.
In the event of non-compliance, Base may take measures as provided for in its regulations, including requesting additional collateral, requesting the allocation of positions to final investors, or other measures consistent with the identified risk profile.
Yes. Participants are assigned monthly to tiers that account for the risk taken within their chain of responsibility over a specific time horizon, allowing for risk management that is proportional and appropriate to the risks assumed.
Yes. Risk bands can influence operational requirements, monitoring criteria, and other controls applicable to participants.
Base Clearing continuously monitors the economic and financial conditions of all participants to which it has significant exposure, including Clearing Members. This oversight uses financial data and market indicators to assess their ability to meet their obligations to the Clearing House.
The admission process includes an assessment of the candidate's operational structure, financial capacity, and risk management mechanisms, in accordance with the requirements set forth by Base Clearing regulations.
No. Requirements remain subject to ongoing monitoring throughout the entire relationship with Base Clearing, with information updates required at least monthly.
Yes. Base Clearing adopts a risk-based approach, considering the size, activity, and exposures under the responsibility of each participant.
Yes. Base provides reports containing information on risk metrics, the scenarios used, and other relevant data to help you monitor and understand the calculations.
Base provides reports related to position closing strategies, financial flows, scenario pricing, and risk metrics.
Yes. Participants have access to margin simulators through the Base portal.
Yes. Periodic stress tests are conducted to evaluate the robustness of risk models and the adequacy of protection mechanisms under severe yet plausible scenarios.
Base conducts stress tests at different frequencies, including daily, monthly, and annual assessments, depending on the objective of each test.
Yes. Risk models undergo regular monitoring, validation, and review processes to ensure they remain aligned with market conditions and applicable regulatory requirements.
Yes. The methodology was developed in alignment with the Principles for Financial Market Infrastructures (PFMI), adopting practices compatible with internationally recognized CCPs.
Yes. The methodology was developed to ensure capital efficiency by leveraging position and collateral netting, the corresponding statistical hedging, and the financial clearing that these enable, while also utilizing the liquidity resources available to Base Clearing.
Yes. The scenario generation model uses heavy tails and non-Gaussian copula dependence, where the risk factor covariance dynamics account for the breakdown and intensification of correlations during market stress. Furthermore, we incorporate prospective scenarios that stress changes in asset market prices and their correlations.
This is the tool where participants track, justify, and contest penalties for delivery failures — it is not where you view the lifecycle of a failure position, which is located on the Failure Positions screen. In the Monitor, the PNP/PL can view T+0 and T+1 settlement failures, receive automatic justifications, submit manual justifications, track the central counterparty's analysis, and file requests for reconsideration — all with a complete audit trail.
There is a section on the Base Exchange website dedicated to all published Official Letters and Announcements. New publications are also sent by email to those who sign up to receive them. These Official Letters and Announcements are part of the transparency rules defined by Base.
To become a participant, the applicant must:
They arise on T+1 of the failure. When a rollover instruction does not settle by the end of the full official window — clearing, non-settlement and optimization algorithms, and the second mandatory loan attempt — the failure position generated on T+0 transforms into these three positions. Base executes the Base Buy-in Mechanism, distributes the balance obtained via Transfer, and forwards the remaining amount to Cash Close-Out.
This is a decision-support screen for the custodian that provides a pre-settlement result after final client allocation and before the official 12:00 PM window. It identifies which delivery obligations are likely to remain outstanding after netting and estimates the potential impact. It functions as an early simulation of the window's logic, allowing for proactive action before the cycle is finalized.
It is the mechanism by which an authorized entity holds, in a controlled and traceable manner, the delivery of securities that a participant is due to receive (a security credit). The security is neither discarded nor lost: it remains held while the restriction is in effect and flows back into the client's account as soon as the restriction is released, within the cycle's timeframes.
Yes. Base's pre-trade risk system features both instrument-level and global metrics, allowing for risk monitoring and control across different levels of exposure.
Base Clearing accepts local currency, federal government bonds, variable income assets, and bank letters of credit, subject to the applicable operational purposes and the eligibility requirements for each.
The Safeguard Structure consists of the mechanisms, resources, and procedures used by Base Clearing to address default events and contribute to market security.
The Base Clearing methodology aims to reflect the effective cost of closing out positions and collateral under stress conditions, accounting for factors such as market risk and liquidity, as well as cash flow mismatches over the close-out horizon, by calculating metrics that quantify permanent and transitory economic impacts.
This refers to an obligation to deliver securities that remains unfulfilled by the 12:00 PM official settlement window cutoff. When a participant fails to deliver the required securities within this window, the remaining balance is classified as a failure and becomes subject to specific procedures. This classification applies to both T+0 and T+1 settlement, depending on the stage of the cycle.
The primary physical infrastructure for Base Exchange is hosted at the Equinix SP6 Data Center. The secondary physical infrastructure is hosted at Ascenty Vinhedo 2.
The available account types and their respective uses are described in the Post-Trade Operational Procedures Manual, which will be released in due course.
Base Securities Lending options are divided into public and private categories. The public option allows for the execution of lending transactions using assets available in public books, meaning that both lending and borrowing orders are visible to everyone for execution at will; contracts concluded through this option feature standardized terms for maturity, grace periods, and reversibility. The private option consists of formalizing a transaction with terms defined bilaterally between the parties in a private setting; contracts concluded through this option feature customizable terms for maturity, grace periods, and reversibility.
This is the mechanism through which Base anticipates the settlement of eligible spot market transactions from T+2 to T+1. As a result, the buyer can receive the securities and the seller can receive the funds one business day ahead of the standard cycle. This anticipation applies to covered sell positions and requires authorization from both parties.
Securities trade settlement occurs on a multilateral net basis: throughout the day, each participant's buy and sell obligations are offset against one another, meaning only the net balance of each security needs to be physically delivered or received. This reduces the movement of securities in custody and lowers operational risk. Securities and cash settlements are coordinated within the settlement windows defined by Base.
This is the process that transforms the clearing result into cash obligations: each participant receives or pays the net amount generated by consolidating their operations. Base consolidates the day's financial events, calculates this net position, and forwards it for settlement within the Brazilian Payments System (SPB). It does not replace the official settlement system — it prepares, validates, and provides traceability for the amounts that will be effectively settled.
Once negotiated, the operation starts the Base Clearing post-trade journey, which includes the stages of Acceptance, Allocation, Give-up, Position formation, and Settlement. During these stages, the trade is validated, its final beneficiary is identified, and it is managed by the Clearinghouse until it is ready for clearing and settlement.
The PNP/PL only sees its own ILAs and failures, and can consult them, submit manual justifications, and request reconsideration. The Base analyst sees the ILAs with pending manual justifications and can approve or reject them, classifying the failure. The Base manager has a complete overview, including parameter configuration, indicators, and consolidated history.
Stocks, units, real estate investment funds, and ETFs are available for trading. The list of authorized instruments is published via Market Data and on the Base website.
The list of participant categories is available for consultation in the “Participants” section of the Base Exchange website.
Because they describe sequential stages of the same process. The Base Buy-in Mechanism is the transaction that brings securities into the system; the Transfer distributes this balance to creditors; and the Cash Close-Out settles in cash what the Buy-in Mechanism did not cover. A single query, across three linked tabs, tracks every transaction failure through to the final outcome for each creditor.
No. It is a projection, not a promise. The final result is only determined during the official 12:00 PM window — specifically because the outcome of the credits depends on the non-settlement algorithm, which only runs during that window and cannot be anticipated. The screen exists to guide action before the closing, not to guarantee an outcome.
Four entities: the Clearing House, the Clearing Member (CM), the PNP/PL, and the Custodian. Each restriction is linked to the entity that applied it, and the sum of all restrictions on a single instruction can never exceed the total credit amount.
The platform provides the following metrics:
By instrument:
Global metrics:
Protected Mode:
Other restrictions:
Collateral deposits can be made through the systems provided by Base Clearing, via the portal or messaging services, in accordance with the operating hours and procedures applicable to each asset type.
Yes. Base Clearing has a Settlement Fund that is part of its Safeguard Structure. Base Clearing and Clearing Members must provide collateral in local currency and/or federal government bonds, as established in the Clearinghouse's regulations.
The methodology combines historical scenarios, quantitative models, and prospective scenarios, allowing for the capture of both observed and projected events. Prospective scenarios evaluate potential correlation breakdowns, always prioritizing plausibility.
This is the record created by the Clearing House to track a failure until its resolution. At the end of the official window, for every regular-way instruction that remains unsettled, the system generates — within the same event — the corresponding rollover instruction and its associated failure position. The position replicates the weighted-average price of the original instruction and tracks the rollover until it is settled or fails again on T+1 of the failure. There is one failure position for each unsettled instruction.
Base Exchange offers various connectivity options to suit different participant profiles, providing flexibility, security, and high availability when accessing its infrastructure.
The connectivity models are:
With these alternatives, participants can choose the connectivity model that best fits their operational needs, balancing performance, resilience, and ease of integration with the Base Exchange infrastructure.
The available statuses and their respective descriptions are detailed in the Post-Trade Operational Procedures Manual, which will be released in due course.
The Base Securities Lending system is accessed by authorized intermediaries on Base as a Full Trading Participant (PNP) or Settlement Participant (PL) on behalf of their investors.
No. Voluntary Accelerated Settlement is optional and requires authorization from both parties — the buyer and the seller. No participant is forced into early settlement against their will: a Voluntary Accelerated Settlement pair only exists at the intersection of two independent authorizations.
Spot trades settle on a T+2 basis, meaning two business days after the transaction. When an obligation is not settled on time, it may be rolled over to the next business day, subject to specific failure handling procedures and a new settlement opportunity.
Base uses the Deferred Net Settlement (DNS) model, a multilateral clearing method within the Brazilian Payments System (SPB). It is “deferred” because funds are transferred at a specific time at the end of the payment cycle rather than in real time, and “net” because the day's cleared balance is transferred instead of each individual transaction. All of this takes place within the Central Bank of Brazil's operational windows. The order is fixed: the position is consolidated first, then settled — no settlement occurs before the day's clearing is closed.
When the Base accepts a trade, the Clearinghouse acts as the Central Counterparty (CCP): it becomes the buyer to the seller and the seller to the buyer. As a result, each participant has the Clearinghouse itself as their counterparty, which eliminates credit risk between the parties and guarantees the fulfillment of settlement obligations.
There are four. The minimum fine (T+0 and T+1) is 0.5%, with a cap of BRL 50,000 per debit ILA and per window. Additional fines apply only to failures classified as non-operational: 0.5% with no cap on T+0 and 4.5% with no cap on T+1. There is also a 5% recurring fine with no cap for repeat offenses. Minimum fines are charged during the execution of the 12:00 PM windows; additional and recurring fines are charged in the cash multilateral settlement on subsequent days.
Base Exchange adopts a standard lot size of 1, so the minimum quantity for trading any instrument is 1.
Data analysis, documentation review, and registration approval may take up to 30 days. Activation depends on the connectivity method used with the Base and the necessary adjustments made by the Participant's technical team.
Always in the same sequence, within the execution of the T+1 failure window: official window → Base Buy-in Mechanism → Transfer (distribution of the balance, from the smallest credit to the largest) → pre-selection of residual pairs → Cash Close-Out. Pre-selection of the pairs is a precondition for the Cash Close-Out price, which only exists once the pairs have been established.
Only settlement structures with a debit pre-result — that is, delivery obligations at risk. This screen is not a complete view of the settlement cycle; it is a tool designed to identify and proactively address potential shortfalls. Structures with a credit result, structurally covered instructions, and uncompensated credits are, by definition, out of scope.
No. It can be total or partial regarding the credit in securities. An instruction can have both a restricted portion and a free portion at the same time — and restrictions from different entities can coexist on the same instruction. The system continuously recalculates the total restricted amount, the amount still available for new restrictions, and the amount free for settlement.
The SPCI, SPVI, SDP, and SPVD metrics account for open orders. The TMOC and TMOV metrics are evaluated with every new order submitted. The SFD metric, however, is only affected by executed trades.
Yes. The schedules for collateral movement and processing are published in the Post-Trading Operating Procedures Manual and the Risk Manual.
An Operational Debtor is a participant who experiences a payment failure due to a duly proven operational contingency, with the expectation that it will be resolved within the same day. Default, on the other hand, occurs when a financial obligation is not met according to the terms established by Base Clearing, or when the conditions that define an Operational Debtor status are no longer met.
Base Clearing provides for two forms of collateralization for spot market positions:
Base applies window mitigation mechanisms in sequence: netting between eligible instructions, which matches opposing obligations without moving custody; non-settlement and delivery optimization algorithms, which leverage balances across different types and maturities; and mandatory security lending, triggered for residual failures. A failure is only officially recorded once these mechanisms have been exhausted.
Yes. The Base Exchange has a dedicated cage at Equinix SP6, located in a data hall exclusive to the Exchange. The exact location of the colocation environment is disclosed to participants in due course. The Base Exchange does not sell physical infrastructure services, such as cages, racks, or power. Colocation services must be contracted directly with Equinix or Ascenty.
The available types of links and their respective purposes are described in the Post-Trading Operational Procedures Manual, which will be released in due course.
All stocks, units, real estate investment funds, and ETFs available for trading on Base are eligible for Securities Lending, subject to risk criteria.
Eligibility originates from the sell side: a short position whose net seller result is allocated and locked in the sell-side coverage portfolio (4409-1). Since the balance is already locked and guaranteed, the delivery of the security is certain by design. Being eligible is a necessary, but not sufficient, condition for Voluntary Accelerated Settlement.
This means Base does not settle each transaction individually. Before delivery, buy and sell instructions for the same security within a single settlement structure are offset against each other, leaving only the net balance to be delivered or received. This mechanism increases cycle efficiency and reduces the need for custody balances.
No. Multilateral settlement entries make up the Multilateral Settlement System (MSS) and are settled within the clearinghouse cycle. Conversely, non-multilateral settlements — such as certain collateral movements outside the netting cycle and direct settlements that bypass the clearing process — are not part of the MSS and are settled through their own workflows, during STR (Reserves Transfer System) operating hours where applicable. Both are monitored and tracked, but they follow separate channels.
Acceptance is the moment the Clearinghouse verifies that a trade meets the criteria to enter the clearing and settlement cycle. Once accepted, the trade gives rise to two independent operations — one buying and one selling — and is managed by the Clearinghouse. From the moment of Acceptance, the transaction becomes irrevocable and irreversible, subject to the exceptions provided for in the Base Regulation.
This is the 0.5% fine (capped at BRL 50,000) applied during the 12 PM final settlement window execution on the failed balance not covered by automatic justifications. The cap applies per debit ILA and per window. Therefore, a rolled-over failure is charged twice: on T+0 for the original ILA and on T+1 for the rollover ILA — these are distinct ILAs, each with its own cap. The minimum fine is not subject to reconsideration.
Not at the moment. The companies traded on Base Exchange are the same as those on the primary listing exchange.
If access authorization is cancelled, you need to start a new access request process.
This is the mechanism through which Base acquires securities in the market that a participant failed to deliver, in order to fulfill the obligation to the party entitled to receive them. The purchase is formed from the Base Buy-in Mechanism order book, between the offer sellers and the outstanding rollover debits — which are the buyers. It serves as the security backing for all other positions.
This is a structural exclusion, not a display limitation. Knowing which credits will actually be settled depends on the execution of the non-settlement algorithm during the official window — a step that cannot be performed in advance. Since this outcome does not exist before the window opens, uncompensated credits are not displayed.
This is an exceptional restriction: when the Clearing House applies it, it requires manual confirmation and operates on the total quantity of the instruction. It is a tool the Clearing House uses in specific risk situations — such as the risk of a participant defaulting — to preventively restrict delivery until the risk is resolved.
When a real-time metric (SPCI, SPVI, TMOC, and TMOV) reaches its configured limit, the order is automatically rejected. When a near-time metric (SDP, SPVD, and SFD) is breached, the entity enters Protected Mode and the order that caused the violation is canceled, provided it has not yet been executed. In the case of the Day Trade Financial Balance (SFD) metric, in addition to entering Protected Mode, all of the entity's open orders are canceled.
Not necessarily. The Clearing House may apply specific valuation criteria for each type of collateral, taking into account factors such as liquidity, volatility, the portfolio's credit risk, and the purpose for which the collateral was deposited.
Yes. The collateral deposited by the defaulting participant may be used in accordance with the procedures set forth in the Base Clearing regulations.
Yes. Base Clearing includes the NAC calculation module, which covers trades that have not yet been allocated to a final investor account. Until allocation occurs, the risk remains associated with the responsible Full Trading Participant (PNP) or Clearing Participant (PL).
No. The instruction that attempts to settle again is the rollover instruction — a separate instruction from the original, generated at the end of the official window during the same event that creates the fail position, which will attempt to settle during the T+1 window following the fail. The fail position is not rolled over: it is created at that moment, associated with the rollover, and remains linked to it. During the T+1 window, the rollover instruction goes through clearing, non-settlement and optimization algorithms, and a second attempt at a mandatory loan once again.
Currently, the connection between the Base Exchange and B3 follows the conventional model via telecommunications carriers. The list of certified carriers is released in due course. The provision of dark fiber for participants with a presence in the B3 colocation facility is still under evaluation, and new alternatives are being studied.
The available types are:
The Securities Lending system is available on all days when there is a trading session on Base, which in turn follows the calendar of the exchange where the assets are listed.
No. Beyond your own eligibility and authorization, there must be sufficient authorized credit on the other side to form the pair. The amount of each security that is actually advanced depends on the Risk module's selection policy. A perfectly eligible and authorized position may not be advanced due to a lack of an authorized counterparty or because of a selection decision.
Base provides monitoring screens where participants can check the real-time status of their instructions throughout the settlement window, including securities settlement, spot positions, failures, and the status of buy-ins and cash close-outs. Queries are updated automatically as processing progresses.
Through multilateral netting based on financial entries. Each daily event — purchases and sales, securities settlement, securities lending, collateral, penalties and charges, failures, and Cash Close-Outs — generates a debit or credit entry. All are consolidated into the Multilateral Net Balance (MNB), calculated per participant, resulting in a single amount to be paid or received, rather than multiple individual settlements.
Operations are never discarded. If no account is specified, the operation is routed to the Capture Account, allowing for subsequent reconciliation during the Allocation process. If the specified account is invalid, it is routed to the Error Account, ensuring full traceability. In both cases, the system applies appropriate operational handling, maintaining complete control and auditability.
This is a 5% fine (uncapped) applied when the same CPF/CNPJ receives an additional T+1 fine more than once within 180 days — a rolling, configurable period that resets with each confirmed charge. This record is agnostic to the PNP/PL: it applies to any participant through which the client operates. If the additional T+1 fine is not charged because the justification was accepted, no recurrence is recorded.
Participants must keep their registration details up to date, ensuring that information and documents are updated whenever any changes occur. Base notifies the Participant when a periodic registration review is required, in accordance with regulatory standards.
The offer trade has a single price, applied equally to both sides — the seller of the offer and the buyer (the missing rollover debit). The cash volume of each line is the executed quantity multiplied by this single price.
By settlement structure — the combination of Clearing Member, PNP/PL (PNP – Full Trading Participant; PL – Settlement Participant), custodian, custodian account, ISIN, and distribution. Each aggregated row represents a pre-result by structure, and the drill-down reveals the composition instruction by instruction, showing what has been cleared and what remains as a settlement requirement.
Before the 4:30 PM DvP settlement, the instruction with active restrictions is split into derivatives: one for each active restriction and one for the unrestricted portion, the sum of which equals the original quantity. The unrestricted portion proceeds to client delivery in the DvP; the restricted portions remain held, each linked to the entity responsible for it.
When an entity (account or document) violates a limit evaluated outside the order's critical path, it automatically enters Protected Mode, allowing only the reduction of open positions for the day. It is also possible to manually activate: Protected Mode, allowing only the reduction of open positions for the day; or Blocked Mode, completely preventing the entry of new orders.
Participants can view information regarding deposited collateral, transactions, releases, and any outstanding issues through the Base Clearing system interface, API, or via messaging services.
The Clearing House follows specific procedures to manage default events, aiming to preserve operational continuity and market stability.
Unallocated trades are processed through the NAC calculation module and consume the Operating Balance Expansion of the responsible Full Trading Participant (PNP) or Clearing Participant (PL) throughout the trading session. If they remain unallocated at the end of the day, they may also impact their margin call.
Yes. Before the 12:00 PM window execution, the Failure Forecast screen provides the custodian with a preliminary settlement result: the projected net result by structure, the netting effect, the quantity still pending effective balance, and the estimated cash impact of the failures. This allows for proactive action — such as covering a balance — before the cycle is definitively consolidated.
Both dedicated and shared connection ports are available, with segregation via VLANs.
The following links require approval:
The system is available from 8:00 AM to 7:30 PM (BRT). The schedules for submitting orders, closing deals, and other processes at Base Clearing are detailed in the Base Post-Trading Operational Procedures Manual.
It consists of two layers. The registration layer is a permanent enrollment: without registration, a participant can never enter Voluntary Accelerated Settlement in any position. The position screen layer operates on top of this: those who are registered are included by default and can restrict individual positions (exclusion by position); those who are not registered can add a position on an ad-hoc basis, just for that day, without creating a permanent enrollment.
Yes. Before the window officially closes, you can check a projected settlement result, which indicates which positions are likely to fail and the estimated impact. This allows participants to take proactive measures — such as covering a balance — before the cycle is finalized.
The MSS is calculated in two stages, in accordance with the operational schedule cut-off times. The Provisional MSS is calculated throughout the window while entries are still being received, serving to monitor and prepare for settlement. The Final MSS is consolidated after the cut-off time, once all valid entries for the day have been processed. Based on the MSS, Base generates the settlement messages — the Provisional LDL and Definitive LDL — which are sent to the SPB; the final version serves as the basis for the actual settlement.
Allocation is the stage where the final beneficiary of the trade is identified and the operational details used for settlement are defined, such as the account, the sub account, and, where applicable, the quantity. At the end of the process, the operation must be correctly directed to the client's Normal Account.
No action is required. The system applies them within the 12 PM final settlement window, before charging the minimum fine. There are three non-exclusive types: third-party T+0 (you did not receive the expected amount for the same security from T-1 to T-5), T+1 delivery (you delivered part of what was missing from T+0 on T+1), and third-party T+1 (you had credit to receive in the same window but did not receive it). Each one exempts the corresponding proportion and comes with a statement of the unreceived credits as evidence.
This is the distribution of the balance earned from the Buy-in Mechanism to rollover credits that were not fulfilled within the window. A rollover debit is distributed to one or more credits, from the smallest to the largest, with partial fulfillment allowed. The security is passed on to the creditor at the weighted-average price inherited from the rollover credit itself that was fulfilled.
Offsetting only occurs between regular-term instructions of opposite natures within the same structure and in portfolios that offset that side. The collateral balance (4390-7) is consumed before the free portfolio (4101-7) to release the collateral first, as it is the more expensive resource. Loan coverage and covered call portfolios do not offset, and rollovers never offset — each appears as a separate line item.
Each entity can only release the restrictions it has applied itself. There is a time window: after 4:30 PM, the system does not accept new restrictions or additional fractional releases — only the release of restrictions that were already registered. Once a restriction is released within the deadline, the corresponding portion becomes available for delivery to the customer again.
When an entity enters Protected Mode, the SPI metric is activated to monitor position inventory. The TMOC and TMOV metrics continue to be evaluated as normal. Other metrics remain updated, but new violations do not trigger additional actions.
Yes. Base Clearing may accept various federal government bonds, provided they meet the eligibility criteria outlined in its risk manual.
The Clearing House may take the measures provided for in its regulations to manage, close out, or transfer the defaulting participant's positions.
No. Proprietary positions held by Trading Participants, Full Trading Participants, Settlement Participants, and Clearing Members must be collateralized by the account holder themselves and are treated within the risk framework as Operational Collateral (OP module).
At the end of the full T+1 settlement failure window, if the rollover instruction remains unsettled, the associated failed position is subject to the Buy-in Mechanism, Transfer, and Cash Close-Out process. The central counterparty acquires the missing securities in the market, distributes the acquired balance to the creditors, and converts any undeliverable securities into their cash equivalent. Further details can be found in the Buy-in Mechanism, Transfer, and Cash Close-Out Positions FAQ.
To trade on the Base, the principal must be registered with the Central Depository used by the Base responsible for the settlement of the operation's assets.
The public mode allows for the entry of lending and borrowing orders, which can be either limit or market orders. The private mode allows for the entry of directed and direct orders. Orders are submitted by an intermediary authorized on the Base as a Full Trading Participant (PNP) or Settlement Participant (PL).
No. There is no such thing as a buy-side coverage portfolio. The Voluntary Accelerated Settlement trigger is always the sell-side debit, allocated to the sell-side coverage portfolio (4409-1); the buy-side credit is matched as a counterparty, but it does not trigger eligibility.
When a participant fails to deliver the required securities by the close of the settlement window, the obligation is classified as a delivery failure. Base automatically triggers a series of mechanisms to resolve it — including offsetting with other positions and a Mandatory Securities Loan — and if settlement is not possible on the same day, the obligation is rolled over to the next business day. If the failure persists, it may be handled through a Base Buy-in or converted into a Cash Close-Out.
To provide cash flow predictability. The Provisional LDL0001 — a settlement advice message transmitted via STR — anticipates the estimated multilateral net balance to the Clearing Member before the final version is sent. This allows the CM to know in advance how much they need to have available to settle within the window and to coordinate with their Settlement Bank. The final amount is the one stated in the Definitive LDL0001.
These are operational accounts used as an intermediary step in the flow, prior to the final settlement in the client's account. They include Master, Intermediary, Admincon, Capture, Brokerage, and Market Maker accounts, each serving a specific purpose. None of these replace the Normal Account: ultimately, the operation must always be directed to its rightful holder.
After the 12:00 PM window on T+1, a period from T+1 to T+3 opens for the PNP/PL to submit a manual justification via the Monitor for any balance not covered by the automated processes, including the evidence requested by Base. There are specific templates for situations such as allocation errors, ETF arbitrage, and market making. Base analyst reviews the submission by T+5 and classifies the failure as operational or non-operational.
The trading phases are: Connectivity Testing, Pre-opening (cancellation only), Continuous Trading, Closing (MOC orders), and Order Cancellation.
When delivery in securities is not possible — for example, due to insufficient balance in the Buy-in Mechanism — the residual obligation is settled in cash: the creditor receives the cash equivalent. Before pricing, the system pre-selects the pairs (debit × rollover credit); the Cash Close-Out price is then the highest value among the rollover debit weighted-average price, the rollover credit weighted-average price, and the previous closing price.
A rollover is a delivery obligation resulting from a previous failure at its final settlement opportunity. It is excluded from netting and is always displayed separately. Because it represents the most critical scenario — as failure to settle ends the cycle and triggers a Base Buy-in Mechanism and Cash Close-Out — it is given top priority for balance consumption.
At the 6:30 PM cutoff, any portion that remains restricted is settled into the responsible entity's restriction account — rather than the end customer's account. This ensures the security is preserved and managed in a controlled manner, instead of being released while the restriction is still in effect.
Initially, there is not a detailed breakdown of aggregated metric consumption. However, this feature is already on Base's roadmap for future updates.
No. Only stocks considered eligible by Base Clearing may be used as collateral. You can check the eligibility criteria in the Base Clearing risk manual.
As a central counterparty, the Clearing House maintains protection mechanisms and a robust Safeguard Structure designed to ensure the rights of performing participants and prevent the impact of default events on other performing market participants.
No. Investors belonging to the same economic group as the participant must have their positions collateralized by the investor themselves, and are handled within the context of Operational Collateral (OP module).
Yes. Through the CCP's interposition, the Clearing House acts as the buyer to the seller and the seller to the buyer. Therefore, those entitled to receive securities will still receive them, even if the original counterparty has defaulted — the defaulted position is assumed by the Clearing House. There is no such thing as a “stranded” creditor participant in the event of a default.
For investors who intend to hold their assets, lending provides extra income while ensuring all rights to future earnings are maintained throughout the contract term, along with the security that the assets will be returned at the end of the agreement.
At T+0, at the 8:30 PM cutoff, positions eligible for T+1 anticipation are determined following the completion of allocation and custodian validation. The associated risk calculation follows at 9:00 PM. This is the point at which candidates are formed, the Risk policy is applied, and matched pairs are produced.
When an obligation is not settled by the deadline, it may be rolled over to the next business day, allowing for a new settlement attempt. Obligations that remain in failure at the end of the delivery window on the settlement date are then processed via Buy-in or Cash Close-Out.
Once the settlement message is sent, the SPB returns a processing confirmation — and only then is your position marked as settled. If a message is rejected, it is resubmitted or handled manually until it is resolved. The entire cycle of sending, returning, and status updates is recorded.
These are exception handling accounts with distinct purposes. The Error Account receives operations resulting from non-compliance with allocation rules, such as missed deadlines. The Operational Error Account receives trades resulting from system failures or downtime. The rules for each are outlined in the Base Post-Trade Operational Procedures Manual.
This determines the charging of additional fines. If the failure is classified as operational — and the justification is accepted — the additional fines are not charged in proportion to the justification provided. If it is classified as non-operational — meaning the justification was rejected or missing — the additional fines are charged. Minimum fines, which are already charged during the 12 PM final settlement window, are not affected by this classification.
Yes, Base uses a Volatility Control Mechanism (VCM) to regulate price fluctuations.
The defaulting participant. In a Buy-in Mechanism, they bear the net difference between the single transaction price and the credit's weighted-average price. In a Cash Close-Out, they bear the difference between the Cash Close-Out price and the credit's weighted-average price. In both cases, the creditor is covered by this spread, preserving the value to which they were entitled.
These are instructions that do not depend on additional liquidity and do not result in a failure, which is why they are excluded from the screen. This applies to Voluntary Accelerated Settlement debits for positions in covered position portfolios and loans in hedging portfolios, which already have pre-established coverage.
Yes. When viewing an instruction, you can see the complete history of restrictions, releases, changes, and routing, along with the individuals responsible for each action. This provides a full audit trail of everything that was held, by whom, when, and the final outcome.
Yes. Historical intraday consumption is available via the portal and API. For previous periods, the maximum recorded consumption for each metric is provided.
Yes. Base Clearing accepts bank letters of credit issued in both physical and digital formats, offering operational flexibility to participants.
Communication procedures regarding default events follow the governance, transparency, and confidentiality rules established by Base Clearing.
Base establishes open position concentration limits per asset at the level of the investor, investor group, participant, and market. When a position at any level of aggregation exceeds the established limit, Base triggers the procedures set forth in the Risk Manual to prevent a single agent from accumulating a position large enough to destabilize the market.
The Failed Positions screen is a query interface that displays one row per position by Settlement Date, including identifiers, nature, settlement structure, quantity, weighted-average price, and cash volume. It is strictly for viewing and exporting data, and each participant can only see their own side. It shows what is in transit for settlement on the day after the failure (T+1), prior to any potential conversion into a Buy-in Mechanism, Transfer, or Cash Close-Out.
Clearing has lender protection mechanisms in place to ensure the receipt of assets within the contractually agreed timeframe or, in exceptional situations, the financial value corresponding to the transaction. A detailed description of these contingency mechanisms is available in the Base Post-Trade Operational Procedures Manual.
No. The “Settlement Forecast” and “Cycle Forecast” are conditional projections calculated before the engine runs (e.g., “if advanced, it will be on T+1 on such-and-such date”). The “Settlement Date” is the actual event, recorded after settlement occurs. The forecast should not be interpreted as a guarantee of Voluntary Accelerated Settlement.
Yes. Some situations trigger automatic justifications — for example, when a participant fails to deliver a security because they did not receive the expected security within the same window. Additionally, participants can submit manual justifications within the established deadline, which are then reviewed by Base. An accepted justification may waive or reduce the corresponding penalty.
The entire cycle is traceable. Every event — entry, calculation, submission, return, and status — is logged, with an audit trail of values and result versions, and a link between the reversing entry and the original entry via reference code. Results are made available in a structured format to Base and participants, allowing for verification and reconstruction of the position.
A Give-up is the transfer, between participants, of the responsibility for risk management and the settlement of an operation. Unlike Allocation, a Give-up does not change the owner of the transaction: it changes who is responsible for it to the Clearinghouse.
If no manual justification is submitted by T+3, the failure is automatically classified as non-operational on T+4, and the additional fines for T+0 and T+1 are charged on that day. If you have submitted a justification, it will be reviewed: if the analyst does not reach a decision by the end of T+5, the system classifies the failure as operational and the additional fines are not charged.
The VCM is triggered when an order could result in trades outside the trading tunnel. For each instrument or group of instruments, Base sets a volatility percentage and a reference price, creating a dynamic price range. If an order exceeds this range, it is rejected and the instrument enters a five-minute stabilization period, during which the Dynamic Tunnel becomes static, limiting the prices of accepted orders.
No. Each position only addresses the unsettled portion of the rollover instruction — the residual — never the original trade quantity.
The projection follows the order of obligation criticality: first the rollover (last opportunity, triggers buy-in/close-out if it fails), then the loan (highest sensitivity for the chain of lenders and borrowers), and finally the spot market (regular term, no history of failure). This order is distinct from the non-settlement algorithm hierarchy.
Yes. There are maximum limits set by the Exchange. Requests for increases can be made via the portal, email, or phone.
No. Both can be used as collateral, provided they meet the acceptance and validation requirements defined by Base Clearing and described in the risk manual.
Yes. Periodic stress tests are conducted to evaluate the adequacy of coverage resources and default management procedures under various market and liquidity scenarios and conditions.
Risk calculations are updated periodically throughout the day to monitor changes in participant exposures and enable timely risk management actions.
Base has a complete view of all positions. Each participant exclusively views information regarding their own instruction, preserving confidentiality between the parties.
In Securities Lending transactions, shares are temporarily transferred to the borrower's ownership. Consequently, for the duration of the contract, the lender is no longer listed as a shareholder of the company and, therefore, cannot exercise voting rights at shareholder meetings.
Yes. Base also acts as an intermediary between buyers and sellers for the Voluntary Accelerated Settlement product (CCP interposition). Therefore, a seller whose buyer defaults on T+1 is paid in the same way — their counterparty is the Clearing House. A seller is never left unpaid due to a buyer's default.
Base applies a sequence of failure mitigation mechanisms: delivery netting, which matches opposing obligations without moving custody; the settlement algorithm, which leverages balances across different timeframes; and finally, mandatory securities lending, which automatically initiates loans to cover residual failures. Only after these mechanisms are exhausted does a failure proceed to Base Buy-in or Cash Close-Out processing.
When the system identifies an inconsistency, a pending approval, or a discrepancy in a position, it is blocked and will not proceed to settlement until it is resolved — without stalling the processing for other participants. The case can be reprocessed, always subject to the necessary approvals and audit logs.
A give-up can only take place when a give-up link has already been registered between the involved participants. Without this link, the transaction cannot be given up.
Yes, but only for additional fines — T+0, T+1, and recurrence. Minimum fines are not eligible for reconsideration. Requests are submitted via the context menu (right-click) on the ILA row in the Monitor grid, within one business day of the charge (by T+5 or T+7, as applicable).
In accordance with CVM Resolution No. 134, each intermediary is responsible for defining the procedures and parameters needed to achieve the best possible result for the client when executing orders. Base remains available to help participants develop and define best execution practices.
Through the linked identifiers of the three tabs. The Buy-in Mechanism identifier is the root; the Transfer identifier refers back to the Buy-in Mechanism identifier that generated the balance; the Cash Close-Out identifier refers to the identifier of the unfulfilled rollover instruction. The chain provides a complete audit trail — from the rollover instruction to the buy-in trade, to the transfer that distributed the balance, and, for any remainder, to the Cash Close-Out.
No. The Failure Forecast does not execute the use of collateral — it merely highlights insufficient funds and indicates the existence of collateral when the instruction is already allocated to that portfolio. Actual usage depends on available funds, authorization from the risk system, and compatibility between the operation's PNP/PL and the assets provided as collateral. The screen can even signal when the use of collateral is likely to be denied due to eligibility issues.
Yes. The carrying firm can assign limits to the executor for pass-through relationships. The executor, in turn, can assign limits to the intermediary for "By Order and Account" relationships.
Digital bank letters of credit are submitted and validated electronically, in accordance with the operational procedures established by Base Clearing and the issuing institution.
The Intraday Risk Limit (IRL) is the risk exposure value permitted by Base Clearing for each Participant without the need for collateralization during the day. This limit is used solely for intraday monitoring of operations and, in conjunction with the collateral provided to increase the operational balance, defines the participant's available operational capacity.
In Securities Lending, the lender temporarily transfers formal ownership of the assets to the borrower and, as a result, is no longer listed as a shareholder with the issuing company, meaning they do not directly receive dividends or distributions during the term of the transaction. However, the loan agreement ensures the lender receives an amount equivalent to these distributions on the same date they are paid by the company, subject to applicable tax treatment. To facilitate this, the Base Clearing system credits the lender and simultaneously debits an equal amount from the borrower. When a corporate action involves the distribution of assets, such as stock bonuses, splits, reverse splits, or similar operations, the lender receives the returned assets with quantities adjusted to reflect the impact of the event. In cases where subscription rights arise during the loan term, the system allows the lender to exercise these rights under conditions equivalent to those they would have had if the assets had remained in their possession, adhering to the same deadlines and values established by the company. However, since the lender is not listed as a shareholder during the transaction, subscription rights are not credited directly to their custody account. In this scenario, the borrower is responsible for returning the subscription rights, the corresponding receipts, or the shares resulting from the exercise of those rights. If subscription receipts or new shares are delivered, the costs associated with exercising the subscription remain the responsibility of the lender.
The failed position is assumed by the Clearing House and follows the standard failure process: rolling over to the next business day following the failure date, followed by a mandatory loan, Base Buy-in, or Cash Close-Out. There is no specific failure engine for Voluntary Accelerated Settlement; the existing failure infrastructure is repurposed.
Base calculates a reference average price for each settlement structure, weighted by the quantities and prices of the trades involved. This price is used to value failures, calculate Cash Close-Outs, and serve as the basis for the Cash Close-Out, ensuring a single, auditable criterion.
Base maintains a contingency plan to ensure settlement continuity even in the event of infrastructure failures or disruptions in communication channels with the Central Bank. In such scenarios, settlement proceeds via alternative means in accordance with Central Bank regulations, ensuring traceability and preventing message duplication; participants are notified when contingency mode is activated. Once operations normalize, events processed during contingency are synchronized with the primary environment.
Once referred, the Destination Participant may expressly accept or reject the referral, where permitted by the rules. Tacit acceptance may also occur if the destination does not respond within the specified timeframe, in which case the give-up is automatically confirmed, as per the Base Post-Trade Operational Procedures Manual. If not accepted, responsibility reverts to the originating participant.
If the T+1 additional fine that created or updated your recurrence record is reversed due to an accepted request for reconsideration, the recurrence record reverts to the last valid occurrence — the last confirmed and non-reversed T+1 additional fine charge. In other words, the reversal restores the count to the correct state.
Base Exchange accepts simple buy and sell orders, limit or market, as well as cross orders. It also accepts MOC (Market on Close) and POC (Passive or Cancel).
No. The Base Buy-in Mechanism, Transfer, and Cash Close-Out Positions screen is for viewing purposes only: participants can view and export data, but cannot edit, approve, reject, or otherwise intervene in the displayed positions.
Take action before the cutoff: cover a balance, switch the instruction wallet on the security settlement screen, or request a margin transfer between PNPs/PLs. Once the action is taken, the Forecast reflects the change in real time and recalculates the projected result, allowing you to immediately verify whether the at-risk obligation has been addressed.
Yes. Limits can be viewed and exported both through the portal and via API.
Yes. Collateral may be substituted, provided that the assets presented meet the criteria defined by Base Clearing and maintain the required coverage.
Limits are based on factors related to the participants' financial capacity, liquidity, operational profile, and history of risk exposure.
Income earned by the lender in Securities Lending transactions may be subject to Withholding Income Tax (IRRF), depending on the investor category, the term of the transaction, and the country of residence.
The applicable rates are:
Resident investor (individual or legal entity) and investor residing in a country or dependency with favorable taxation ("tax haven"):
Foreign investor: 15%
Financial institution: exempt
For the borrower, there is no Withholding Income Tax on the execution of the lending transaction; only applicable fees and operational costs are due.
For more information on the taxation of Securities Lending transactions, please refer to RFB Normative Instruction No. 1,585.
This is a loan automatically triggered by Base to resolve residual delivery failures. In the event of a failure, Base checks the donor offers available in the public securities lending book and executes the necessary transactions to cover the shortfall, allowing settlement to be completed. This is a last-resort mechanism, applied only after all other mitigation measures have been exhausted.
Within the window, your position remains pending or awaiting settlement; once the full amount is received, it is settled (a partial payment is recorded as such). If the cutoff time for the schedule is exceeded without payment, the participant enters a state of arrears, which may result in a late payment penalty—typically included in the following day's multilateral cycle—and a requirement for a formal justification. In cases of prolonged arrears without resolution, a declaration of default may be issued. Once the situation is resolved, the status returns to normal.
The Base provides for two modalities: Brokerage Give-up, which involves a link between the originating and destination participants; and Tri-Party Give-up, which also includes the investor in the link. The concept of transferring responsibility is the same for both; what changes are the links between the participants.
A POC is a limit order that is only accepted if it rests in the book as a passive order, waiting for a counterparty. If, when sent, it would execute immediately against an existing order in the book, it is automatically cancelled instead. This ensures the order never acts as an aggressor. It is designed for liquidity-providing algorithms.
Base has a complete view of all pairs. Each participant exclusively views their own side: the debtor sees theirs, and the creditor sees theirs.
Yes. All limit management screens feature file import and export functionality.
Yes. You may withdraw or replace collateral, provided that the release criteria required by the Clearing House and described in the risk manual continue to be met.
The Operational Balance represents a Participant's available operational capacity to take on new intraday exposures. It is calculated as the difference between the Intraday Risk Limit, plus any collateral provided to increase that limit, and the Intraday Risk effectively calculated by the Clearing House.
All Securities Lending contracts are subject to a minimum grace period of 1 business day following the settlement of the trade opening. In private transactions, this period can be negotiated between the parties, whereas in public transactions, the 1-business-day grace period is mandatory. Requests for early settlement can only be made after the contractual grace period has been fulfilled. Furthermore, for a lender to request early settlement, the contract must include a reversibility clause in their favor. In such cases, the borrower has a minimum timeframe to return the assets, which varies depending on the time the lender's intermediary submits the request. When an early settlement request is made by the borrower, the settlement occurs on the business day following the request.
The Base Buy-in is the mechanism through which Base acquires securities in the market that a participant failed to deliver, in order to fulfill the obligation to the party entitled to receive them. The purchase is executed based on specific offers, and the corresponding cost is charged to the participant who defaulted.
Yes. Market Maker and DMA Session operations cannot be rejected by the Destination Participant, which preserves the specific characteristics of these operating models. If rejection is necessary in these cases, the request is analyzed by the Clearinghouse.
Yes. Orders can be valid until a specific date or until cancelled, for a maximum of 1 (one) year.
The SPCI, SPVI, TMOC, and TMOV metrics are evaluated on the critical path in real-time. The SDP, SPVD, and SFD metrics are evaluated in near-time, once the order enters the matching engine. For cross orders, all metrics are evaluated in real-time.
If collateral is found to be insufficient, the participant must replenish the required amounts within the timeframes and procedures established by the Clearing House.
Yes. Base provides tools for continuous monitoring of the Operating Balance and the exposures associated with the participant.
The renewal of Securities Lending agreements depends on the initiative of one of the parties involved, who must submit the request through the intermediary institution responsible for the operation, whether it be a brokerage, distributor, or custodian. For the renewal to be finalized, the counterparty must also agree, and they may accept or decline the request within the timeframes established by Base. Therefore, it is recommended that the parties align beforehand regarding their interest in the renewal to ensure the process is successful.
When security delivery is not possible — for example, due to a lack of offers for the Base Buy-in — the obligation may be settled in cash: the participant who was to receive the securities receives the cash equivalent, calculated based on a reference price defined by Base. This process is known as Cash Close-Out.
A give-up is always originated by a Full Trading Participant (PNP). The destination can be either a Full Trading Participant (PNP) or a Settlement Participant (PL).
Yes. Base Exchange accepts Fill or Kill (FOK) and Immediate or Cancel (IOC) orders via the ALO Binary and FIX protocols.
Limits can be assigned at the Account, Investor, and Trader levels. For "By Account and Order" relationships, it is also possible to assign global metrics aggregated at the intermediary level.
In the event of non-compliance, Base may take measures as provided for in its regulations, including requesting additional collateral, requesting the allocation of positions to final investors, or other measures consistent with the identified risk profile.
The possibility of selling assets during the term of the agreement depends on the policies established between the principal and their intermediary. When permitted, the transaction requires the early settlement of the lending agreement, which must occur within the settlement period for the asset sale. It is the sole responsibility of the intermediary institution to process the early settlement request, the sale of the assets, and any other workflows necessary to ensure the proper execution of the transaction.
Assets held as collateral may be used in the settlement process, in accordance with specific rules and subject to authorization by the Base Collateral module. Collateral helps reduce the risk of failure and is factored into the cycle's clearing mechanisms.
All processes take place within defined operational windows, which make up the Base Clearing Schedule and are executed in real time. Detailed schedules for acceptance, allocation, and give-up are described in the Base Post-Trade Operational Procedures Manual.
Yes. Base accepts MOC orders. Detailed rules will be announced soon.
Yes. Profiles are used to facilitate the bulk assignment of limits, while maintaining the ability to create exceptions directly at the entity or instrument level.
Yes. Participants are assigned monthly to tiers that account for the risk taken within their chain of responsibility over a specific time horizon, allowing for risk management that is proportional and appropriate to the risks assumed.
Yes. All Securities Lending contracts traded on Base are automatically renewed upon maturity by default. Renewal generates a new contract with the same characteristics as the original, ensuring position continuity and avoiding unnecessary liquidations. In the renewed contract, the rate is updated to the average asset rate published by Base, the quantity corresponds to the balance of assets not previously liquidated (if no early liquidation occurred, the quantity remains the same as the previous contract), and the new maturity is set to 21 business days. Furthermore, automatic renewal can be disabled at the time the operation is contracted. If this option was not selected initially, but the parties decide to terminate the contract at maturity, the cancellation of the automatic renewal can be requested up to T-3 before the maturity date. This request can be made by either the lender or the borrower and is subject to the counterparty's approval.
Yes, in specific risk situations. If there is a risk of a participant defaulting, Base may preventively restrict the delivery of securities to them in a controlled and traceable manner until the risk is resolved. If the risk is not resolved by the cycle's cutoff time, the securities are directed to a restricted account instead of the participant's account.
The Base generates real-time operational events and makes them available through various channels: immediate screen updates, monitoring dashboards, APIs, messages, and files for the involved participants. This way, tracking does not rely on manual queries.
No. Trades executed on Base are cleared and settled exclusively through its own post-trade infrastructure. Therefore, buys and sells executed on different exchanges are treated as independent transactions, known as arbitrage trades, and do not qualify as day trades across markets.
Between a limit assigned to a profile and a specific limit assigned directly to an entity or instrument, the specific limit always prevails. When limits are assigned at different levels, the most restrictive limit prevails.
Yes. Risk bands can influence operational requirements, monitoring criteria, and other controls applicable to participants.
Yes. If the parties wish to renew a contract with terms different from those set out in the automatic renewal, a manual renewal can be performed. In this case, the renewal does not follow the standard parameters and is subject to approval by the participant, the counterparty, the carrying broker (where applicable), and the custodian, in the case of custody routing. The request can be made from the grace period date up to T-3 of the maturity date, provided the established deadlines for this procedure are met. During manual renewal, it is possible to change the quantity of assets (limited to the active balance of the original contract), the lending fee, the maturity date, the grace period date, and the reversibility to the lender. Changes to the maturity date, grace period date, and reversibility to the lender are only permitted for private contracts. Manual renewal is not permitted for contracts taken compulsorily to address delivery failures or for defaulted contracts.
Penalties are available for consultation on Base's own monitor, including details of the failure, the amount, and the calculation basis. Participants are notified of relevant events via screen and messaging, allowing them to track the complete lifecycle of each occurrence.
When an operational rule is not followed — such as a late indication or allocation, or a change in ownership as outlined in the Base Post-Trade Operational Procedures Manual — the system automatically identifies the occurrence and makes it available for correction. The participant enters the justification directly into the system, eliminating the need for separate signed documents, and every step is recorded to create a complete audit trail.
Orders can be cancelled through the drop copy supervisory session or through Base's order management platform.
Yes. It is possible to set limits by instrument group using the Authorized Market (MKTA) concept. The classification methodology will be published soon.
Base Clearing continuously monitors the economic and financial conditions of all participants to which it has significant exposure, including Clearing Members. This oversight uses financial data and market indicators to assess their ability to meet their obligations to the Clearing House.
Operations on Base can be contracted with a rate between 0.00001% and 499.99999%.
Yes. Delivery failures are subject to a penalty applied to the undelivered quantity, and there is also a penalty for late cash settlement. The percentages and limits are progressive based on the situation and the time taken to rectify the issue, and they are detailed in the Base Post-Trade Operational Procedures Manual.
No. All processing is handled within the system, in accordance with the authorization levels and permissions defined by the Base. The justification is recorded electronically, and the audit trail — including the user, date, and time — serves as the official record of the event.
Base accepts the ALO binary protocol, native to its matching engine, as well as FIX 4.4.
The platform provides a Consumption Ranking accessible via portal and API, allowing for real-time monitoring of the usage levels of the limits assigned to entities.
The admission process includes an assessment of the candidate's operational structure, financial capacity, and risk management mechanisms, in accordance with the requirements set forth by Base Clearing regulations.
The system can be accessed via the Base Portal (Base Services Portal), through APIs, or via messaging. Technical specifications for each access method are made available on Tech Base (Base Technical Portal).
Yes. Additional fines may be appealed through a reconsideration request, which must be submitted within the timeframe indicated in the monitor itself. The request is reviewed by Base,which may either uphold or overturn the fine. Minimum fines, which are of a lower value, are not eligible for reconsideration.
All rules, schedules, and exception handling procedures are described in the Base Post-Trade Operational Procedures Manual (the official reference for participants).
Yes. There is a throttle per session (FIX or binary), which sets a maximum number of messages per second. The limits will be published soon.
The platform provides audit reports via portal and API, allowing you to track changes made by authorized users, including modifications to limits, profiles, blocks, configurations, and other relevant events.
No. Requirements remain subject to ongoing monitoring throughout the entire relationship with Base Clearing, with information updates required at least monthly.
Direct orders are private-type orders entered by a participant who identifies both the lending client and the borrowing client at the time of the trade, with both parties under their responsibility. Directed orders also fall under the private category, but are entered by a lending participant and directed to a specific borrowing participant. In this case, the lender and the borrower are under the responsibility of different intermediaries.
Our protocols are available on our website so that brokers can assess the adjustments needed. We provide technical support and assistance with questions and custom solutions, ensuring a fast and efficient integration.
Base provides a residual risk report calculated based on the stressed economic capacity of the participant's chain. The full methodology will be published soon, and the expectation is that the calculation details will be available directly on the pre-trade portal.
Yes. Base Clearing adopts a risk-based approach, considering the size, activity, and exposures under the responsibility of each participant.
A limit order is an order where the participant sets a limit rate for executing transactions. Execution only occurs if there is a counterparty willing to trade at conditions equal to or better than the specified rate; if no counterparty is found, the order is added to the loan order book. A market order, on the other hand, is an order without a defined rate that is executed immediately at the best available market rate at the time of entry for the desired asset, provided a compatible counterparty exists; in this case, if no counterparty is found, the order is cancelled.
The Market Data specification, called ALI Protocol, is already available. The instruments, tickers, and ISINs are the same as those traded on the primary listing exchange. Any consolidation of Market Data between the primary listing exchange and Base is done through vendors that offer this service.
No. Metrics start at zero at the beginning of each trading session. The only exception is when an entity has open GTC (Good 'Til Canceled) orders, which continue to be included in the calculations.
Yes. Base provides reports containing information on risk metrics, the scenarios used, and other relevant data to help you monitor and understand the calculations.
Yes, active contracts can be transferred in the following scenarios:
Without a change in the principal:
With a change in the principal:
The transfer always involves the total quantity of active assets and any already provisioned earnings, as the object of the transfer is the contract in its entirety. The transfer of the position may imply the transfer of collateral linked to the position, which must be requested jointly. The transfer is subject to evaluation and approval by the Clearinghouse and the participants involved in the transfer. All details are described in the Base Clearing Post-Trading Operational Procedures Manual.
Base provides MBE (Market by Event), which includes all orders, executions, trade cancellations, instrument list, trading status changes, and trading tunnel. It also provides a feed with top of book and trade statistics (high and low prices, traded volume, among others).
By default, new accounts can inherit the settings previously defined for the investor or the structure to which they belong. This allows the account to begin operations with the applicable limits and restrictions already in place, reducing the need for additional manual configuration.
Base provides reports related to position closing strategies, financial flows, scenario pricing, and risk metrics.
The clocks of the trading services are synchronized via PTP. Market Data event timestamps are the same as those of the events generated by the matching engine.
New investors and traders are automatically associated with the default profile provided by the Base and configurable by each institution. This ensures that the entity is created with the limits, permissions, and restrictions defined in the institution's standard profile, allowing it to begin operations in accordance with pre-established rules.
Yes. Participants have access to margin simulators through the Base portal.
No. Base does not provide a consolidated Market Data feed.
Yes. Protected Mode is designed to help reduce an entity's risk. Therefore, canceling existing orders remains permitted, as does submitting orders that result in a reduction of position.
Yes. Periodic stress tests are conducted to evaluate the robustness of risk models and the adequacy of protection mechanisms under severe yet plausible scenarios.
Yes. Drop Copy is available via FIX 4.4. It can be filtered by account, CNPJ (Brazilian company tax ID), and order entry session. It can also be configured to send only trades or all messages.
Yes. Rejection messages identify the source of the restriction, allowing the user to understand whether the rejection was caused by a limit associated with the executor, carrying broker, intermediary, or the monitored entity itself.
Base conducts stress tests at different frequencies, including daily, monthly, and annual assessments, depending on the objective of each test.
The order management platform provided by Base lets you filter all order rejections along with their reasons. Rejection details are also included in the messages sent through the Order Entry sessions.
Yes. The configured limits can be changed at any time during the trading session, both through the Portal and the API.
Yes. Risk models undergo regular monitoring, validation, and review processes to ensure they remain aligned with market conditions and applicable regulatory requirements.
Yes. Base offers trading services and has its own clearing and settlement infrastructure (Clearing). Custody is unified, since Base is connected to the primary listing exchange's central depository.
Yes. The methodology was developed in alignment with the Principles for Financial Market Infrastructures (PFMI), adopting practices compatible with internationally recognized CCPs.
No. Trades executed on Base Exchange are settled only through Base Clearing.
Yes. The methodology was developed to ensure capital efficiency by leveraging position and collateral netting, the corresponding statistical hedging, and the financial clearing that these enable, while also utilizing the liquidity resources available to Base Clearing.
Yes. The scenario generation model uses heavy tails and non-Gaussian copula dependence, where the risk factor covariance dynamics account for the breakdown and intensification of correlations during market stress. Furthermore, we incorporate prospective scenarios that stress changes in asset market prices and their correlations.