On May 4th, 2026 — next Monday, next week — the requirement established by BCB Resolution nº 519 comes into effect: from that day forward, every international transaction conducted by Brazilians with virtual assets must be reported to the Central Bank, with detailed information on amounts, purposes, counterparties and countries involved. It is the final step of a regulatory process that began in February 2026, when the Resolution came into effect, and that will extend for several more months to fully cover the universe of Virtual Asset Service Providers (SPSAVs) operating in Brazil. In practical terms, crypto ceases to be a gray zone and becomes, officially, part of the monitored financial system.
That is the easy headline. The more interesting story, however, is happening in parallel, in a movement that few Brazilian outlets are connecting: while the Central Bank completes its surveillance architecture for cross-border crypto, B3 — the Brazilian exchange — is preparing to launch its own stablecoin backed by the real, filling the market vacuum left by the shutdown of Drex. The two movements are not coincidental. Together, they compose the framework of a new architecture for Brazil's digital real — one in which tokenized infrastructure is private, but monitoring remains public.
What happened to Drex
Drex — an acronym that replaced, in 2023, the original name "Digital Real" — was announced by the Central Bank as Brazil's CBDC (Central Bank Digital Currency), designed to integrate currency issued by the BC with blockchain infrastructure for institutional use. The first phase of operational testing, conducted in 2024 and 2025 with participation from banks, fintechs and technology providers, revealed what was internally known but not publicly admitted: there was structural incompatibility between transactional privacy and regulatory oversight, and the proposed architecture did not scale economically for retail volumes.
In November 2025, the Central Bank ended the testing phase and shut down the then-operational platform, announcing that the project would be reorganized and relaunched in 2026 in a format with greater market participation. It was not cancellation — it was strategic pause. But in practice, the original Drex ceased to exist. And the five-month gap between shutdown and relaunching opened a window of opportunity that the Brazilian private sector, historically slow to adopt tokenization, quickly saw.
B3 fills the vacuum
B3 announced in December 2025 — just weeks after Drex's shutdown — its intention to launch, in the first half of 2026, a stablecoin backed by the real and an asset tokenization platform. The move, later confirmed in interviews with B3 executives throughout the first quarter of 2026, positions B3 as the central agent in the next stage of Brazilian tokenization.
Luiz Masagão, B3's vice president of products and clients, was explicit about the internal reading of the context: "with Drex's end, the market has this demand for an asset that serves to settle the entire digital economy. The market continued to need a reliable asset for digital operations, and B3 believes it can fulfill this role." The phrase deserves careful reading. It is the first public admission, from a heavyweight executive of the Brazilian financial market, that Drex failed — and that the replacement will not come from a 2.0 version of the public project, but from a private alternative built on B3's existing infrastructure.
The announced technical architecture includes:
- Stablecoin issued by B3, backed by the real — functioning as a settlement medium for assets tokenized on the exchange's platform, with integration to the clearinghouse as collateral.
- Tokenization platform — capable of issuing on-chain representations of fixed income securities, stocks, funds and potentially other assets, with instant settlement against the stablecoin.
- 24/7 operation — independent of traditional banking system hours, but with possibility of automatic conversion to conventional settlement when necessary.
- Hybrid model — in which traditional and tokenized assets coexist with shared liquidity, allowing investors to trade in any format and the exchange to manage conversion between the two.
The operational point is important: B3's stablecoin is not a cryptocurrency in the conventional sense. There is no mining, no decentralization, no distributed custody. It is a tokenized representation of the real issued by a centralized and regulated private institution — closer, in nature, to a tokenized deposit than to a USDT or USDC. And it is precisely this proximity to the traditional banking system that makes it palatable to the regulator, and operationally viable for Brazil's capital markets ecosystem.
What changes on May 4th
The BCB Resolution nº 519, published in 2025 and in effect since February 2nd, 2026, governs the provision of virtual asset services in Brazil. It defines who can provide services (SPSAVs — Virtual Asset Service Providers), requirements for authorization, and the supervision regime by the Central Bank. Most of its provisions are already producing legal effects. But the obligation to report international operations comes into effect only on May 4th, 2026 — a week from now.
What the obligation covers, in broad strokes:
- Who must report: SPSAVs authorized to operate in Brazil, including exchanges (Mercado Bitcoin, Foxbit, Binance Brasil, etc.), crypto brokers, custodians and payment platforms operating with virtual assets. Individual persons operating directly with foreign exchanges without local intermediation are not required to report individually — but the exchanges serving them, if authorized in Brazil, are.
- What must be reported: international operations (buy, sell, transfer) involving a counterparty or destination outside Brazil — including amount in national currency, amount in virtual asset, stated purpose, counterparty identification (when available), destination country and on-chain wallet identification (when applicable).
- In what timeframe: the reporting regime is still being finalized in complementary normative act, but market expectation is that it operates on a periodic basis (monthly or weekly), not in real time, with format analogous to SISBACEN for foreign exchange operations.
The immediate practical effect is threefold. First, the BC gains full visibility into cross-border crypto flows originating from exchanges authorized in Brazil — something that, until now, was a blind spot. Second, it increases the regulatory cost of operating as an SPSAV in the country, creating additional pressure on smaller players who have not yet consolidated compliance infrastructure. Third, it shifts the use of unauthorized (offshore) exchanges to a riskier place: the Brazilian who chooses to operate on a foreign exchange without local registration can continue to do so, but the Revenue Service and BC will now have tools to identify discrepancies between what was individually declared and the aggregate flow captured by authorized exchanges.
The intersection with Bill 4.308 — and the problem of private tokenized real
There is, in parallel to all this, a legislative discussion underway in Congress. Bill 4.308/2025, in processing in the Chamber, proposes several changes to virtual asset regulation in Brazil. The most controversial provision is Article 13-E, which ON3X analyzed in depth on April 28th, and which establishes an important obligation for issuers of stablecoins backed by the real: the transfer of a portion of reserve income (currently invested in public securities that pay Selic — currently 14.75%) to stablecoin holders.
Article 13-E is, in practice, the only chance a Brazilian real stablecoin has to compete economically with USDT and USDC, because the real captures, via Selic, an interest rate differential that the dollar does not offer. Without income transfer, buying a real stablecoin means freely handing the issuer the spread between Selic and zero — which is exactly Tether's business model with USDT, but in a Brazilian scenario with positive real interest rates becomes a visible opportunity cost for the user.
This is where B3's announcement gains sharper contours. By positioning itself as the central issuer of the real stablecoin for Brazil's capital markets, B3 is candidating to be the first beneficiary — and potentially the first "regulation victim" — of Article 13-E. If B3's stablecoin is classified as an instrument subject to 13-E, the exchange will need to transfer Selic to holders. If not, B3 captures the full reserve income for itself — operating, in practice, an implicit money market fund disguised as a payment medium.
The political negotiation around Bill 4.308 over the coming months will probably revolve around exactly this definition. And the lobbying from B3 and Brazilian banks will be aligned: none of them want to be forced to transfer Selic to stablecoin holders, because that ends the product's economics. The question is whether Congress will accept creating a formal exception for stablecoins issued by regulated institutions — which would open a regulatory arbitrage vector — or whether the 13-E regime will be uniform.
The hybrid model — private in infrastructure, public in monitoring
What is being drawn, read together, is a Brazilian tokenization model that differs significantly from both pure CBDC (original Drex) and crypto laissez-faire. It has three layers:
- Issuance layer — private, dominated by B3 (and probably, in a second moment, by individual banks that will launch their own stablecoins in parallel, the same way JP Morgan and Bank of America operate in the American context). Tokenized real, in Brazil, will be issued by regulated private institutions — not by the Central Bank.
- Infrastructure layer — also private, but potentially convergent toward shared standards (B3 already has, by its nature, a central position; individual banks may opt for B3's own standards or for international standards like ERC-20 with compliance adaptations).
- Supervision layer — public, exercised by the BC via Resolution 519 and the reporting regime that comes into effect on May 4th, and potentially by CVM in cases where tokenized assets are classified as securities.
This hybrid model has international precedents. Argentina's CNV Resolution 1069, approved in April 2026 and analyzed by ON3X, follows similar logic, creating Latin America's first regulatory framework for real asset tokenization under coordination of the securities regulator. The American GENIUS Act, whose implementation was the subject of recent tension between banks and regulators, proposes conceptually analogous architecture: stablecoins issued by regulated entities, centralized federal supervision. And the institutional tokenization regime described in the Chainalysis report on the US$ 30 billion in tokenized RWAs shows that the global ecosystem is converging toward this model of "regulated blockchain" — technical decentralization, institutional centralization.
What can go right
The Brazilian model, if executed competently, has three advantages over alternatives:
Speed of implementation. B3 already has infrastructure, relationships with institutional clients, a clearinghouse and regulatory licenses. Launching a stablecoin backed by the real and an asset tokenization platform does not require building from scratch — it requires adding a blockchain layer to an existing operation. Drex would have needed to build this layer from scratch, with participation from multiple actors in consortium, and that was exactly what failed.
Compatibility with the existing financial system. B3's stablecoin will operate within a regulatory perimeter familiar to banks and managers. Drex tried to create a new perimeter, with its own technical and operational rules. For Brazil's institutional ecosystem, adopting B3 will be operationally cheaper.
Natural regulatory visibility. Since B3 is a highly supervised institution by CVM, BC and Revenue Service, stablecoin operation will be permanently under public scrutiny. This reduces the risk of retroactive regulatory surprises — something that haunts smaller stablecoin issuers in other jurisdictions.
What can go wrong
The same model, read in reverse, has three structural risks:
Market power concentration. If B3 becomes the only — or the predominant — issuer of real stablecoin for institutional use, it gains a de facto monopoly position over tokenization of Brazil's monetary asset. This creates systemic dependence: a technical failure or reputation crisis at B3 could paralyze not only the capital market, but also the entire tokenization infrastructure that would be built on its stablecoin. Drex, in theory, had the BC as sole issuer — but the BC has a constitutional mandate to issue currency. B3 does not.
Lack of competition on user income. If Article 13-E is not applied to B3, or if B3 gets an exception, the stablecoin will operate by capturing the Selic-zero spread for its own benefit. This may be institutionally sustainable, but it is a silent income transfer from stablecoin holder to the exchange — exactly the problem that 13-E intended to solve, and that would motivate, if uncorrected, continued flight of Brazilian retail to USDT.
Replication of Drex's vices under another name. Drex failed, in part, because transactional privacy was sacrificed to regulatory oversight, making the user experience worse than the traditional banking system's. If B3's stablecoin inherits the same level of monitoring — because B3 is a regulated institution and needs to report everything to the BC — it may replicate the problem. The difference is that, this time, the user does not have the alternative of "Drex 2.0" to choose; they have the alternative of USDT, which continues to outshine movement and which Resolution 519's regime can only partially capture.
ON3X perspective
Three readings to close:
1. Drex died, but centralization did not. Drex's end is, at first glance, a victory of the market over the State: the public initiative failed, and the private filled the vacuum. But the reading is partial. The model being drawn preserves centralization — it only displaced it from the public entity (BC) to the private entity (B3). For the end user, the operational difference may be smaller than it appears. What changes is the economic logic: instead of the BC capturing digital seigniorage, B3 captures financial spread. The State abandoned the attempt to monopolize digital real — but in doing so, handed on a silver platter to a private agent the position it could not build.
2. Resolution 519 is more important than the news suggests. The mandatory reporting of international crypto operations, which comes into effect on May 4th, will produce, within six to twelve months, the first systematic mapping of Brazilians' cross-border crypto use — something that today exists only in indirect estimates. This mapping will be input for everything: tax policy, exchange policy, definition of rates, definition of exceptions in Bill 4.308. Whoever operates crypto in Brazil in 2026 should assume they are being recorded and that the record will be used to define the regulatory regime of 2027 and beyond. It is not dystopian surveillance; it is empirical building of regulatory framework. But it has immediate practical effects on transactional privacy and tax arbitrage.
3. The true test of hybrid architecture will be retail. The B3 + Resolution 519 model works very well for the institutional use case: banks, managers, funds, brokers. For the Brazilian end customer, however, the architecture is less obvious. The concrete question is: when a Brazilian citizen goes to buy a stablecoin for everyday use — protection against inflation, international payment, short-term value reserve — will they prefer B3's stablecoin or USDT? If B3 offers income and USDT does not, B3 wins. If B3 offers full tracking and USDT offers pseudonymity, USDT wins. The outcome of this choice — which will accumulate over months, not days — will determine whether private tokenized real is an economic reality or just an operational efficiency layer for capital markets. And that outcome depends, ultimately, on how much income B3 will be allowed to capture for itself — which directly returns to the discussion of Article 13-E.
Brazil is building, in 2026, the digital monetary infrastructure that will operate for the next twenty years. Today's decisions — who emits, who oversees, who captures income — will produce cumulative effects that will be hard to reverse. The good news is that, unlike the original Drex, the current design allows incremental corrections and real market participation. The bad news is that, without public vigilance over the economic terms of the arrangement, private centralization substituting public centralization may end up producing the same outcome one wanted to avoid — just with private profit instead of public seigniorage. On May 4th, the clock starts.