Brazil’s Finance Ministry blocked access to prediction market platforms on April 24, targeting Polymarket and Kalshi among others. By Friday afternoon, both platforms were inaccessible inside the country. The action was paired with a separate resolution from the central bank prohibiting the derivative contracts that power these markets, marking one of the broadest single-day moves any major economy has taken against the sector.
What the Finance Ministry Actually Did
Finance Minister Dario Durigan said the platforms violated betting regulations approved by the Brazilian Congress and that prediction markets are not legal or regulated in the country. He framed the block as a protection measure for household savings, citing rising gambling addiction and broader government efforts to reduce debt levels.
Durigan said the government has “advocated for stricter enforcement and very rigorous regulation, which will continue to advance, so that we can curb the negative externalities and social harm that unregulated gambling causes to the Brazilian population.”
Chief of Staff Miriam Belchior described the policy goal in operational terms: protect income, prevent financial losses, and reduce household exposure to unsafe practices.
The Central Bank Closed the Other Door
While the Finance Ministry was cutting access at the platform level, Banco Central do Brasil issued a separate resolution targeting the financial instruments themselves. The central bank prohibited derivatives contracts based on sports events, virtual gaming, political outcomes, and other non-economic benchmarks, citing risks to investor protections and market integrity.
The two-track approach matters. Blocking website access alone leaves users with VPN workarounds and offshore alternatives. Banning the underlying contract type forces banks, brokers, and licensed financial institutions inside Brazil to refuse the products outright, regardless of where the platform hosting them is based. Together, the measures are designed to remove both the consumer-facing entry point and the institutional infrastructure that could replicate it domestically.
Brazil Is Part of a Wider Pattern
The Brazilian decision lands in the middle of a broader regulatory squeeze on prediction markets. Pressure has been building across multiple jurisdictions over the past four months, with each action narrowing the operating space for platforms that had previously expanded with limited friction.
| Jurisdiction | Action | Targeted Platforms |
|---|---|---|
| Portugal | Access restriction (January) | Polymarket |
| Wisconsin | State lawsuit (April 24) | Kalshi, Polymarket, Robinhood, Coinbase, Crypto.com |
| Brazil | Federal access block (April 24) | Polymarket, Kalshi |
The Wisconsin lawsuit, filed the same week as the Brazilian ban, alleges that sports event contracts offered by Kalshi, Robinhood, Coinbase, Polymarket, and Crypto.com violate the state’s commercial gambling ban. Portugal restricted Polymarket access earlier this year on similar grounds. The throughline is that regulators in different legal traditions are reaching the same conclusion: contracts on sports, elections, and weather behave like gambling, and the platforms offering them are operating outside whatever licensing regime governs gambling in that jurisdiction.
What This Means for the Market Going Forward
The platforms have built their growth on a specific argument: prediction markets are derivatives, regulated under a different framework than sportsbooks, and beneficial as information aggregation tools. That argument has held in some places. It is now visibly failing in others.
For Polymarket and Kalshi, losing Brazil removes one of the largest emerging-market user bases in their footprint. More important than the immediate revenue impact is the precedent. A G20 economy banning the category outright, with both the political and central-bank arms moving in the same week, gives other regulators a complete template to follow. Watch which countries cite Brazil’s approach in the next round of restrictions, because that will indicate how durable this expansion model actually is.
