Brazil Blocks Prediction Market Platforms, Tightens Derivatives Trading Rules

Brazil has taken a decisive step to regulate its financial and digital markets by blocking 27 prediction market platforms and tightening rules on derivatives trading. The move, announced by Finance Minister Dario Durigan, aims to curb what authorities describe as gambling products disguised as legitimate financial instruments.

The country’s telecommunications regulator, Anatel, enforced the ban, making popular platforms such as Polymarket and Kalshi inaccessible across Brazil by Friday afternoon. While initial reports mentioned 28 blocked platforms, the Finance Ministry later confirmed that 27 firms were affected.

At the core of this decision is a new resolution from Brazil’s National Monetary Council, which now strictly defines which underlying assets can be used in derivatives trading. Under the updated rules, derivatives linked to sports events, online gaming, political outcomes, elections, and even cultural or social events are prohibited. Instead, only contracts tied to recognized financial benchmarks—such as interest rates, exchange rates, and price indices—are permitted.

Despite the crackdown, derivatives trading itself remains legal in Brazil, provided it is conducted through authorized firms that comply with existing financial regulations. Officials emphasize that the goal is not to restrict legitimate financial activity but to prevent misuse of financial instruments for speculative betting.

Economic Reforms Secretary Regis Dudena clarified that Brazilian law previously recognized only two categories for betting: real-world sports events and online games. According to Dudena, many prediction market platforms attempted to position themselves as financial services by offering derivatives, but in reality, their operations closely resembled gambling.

Authorities argue that these platforms posed significant risks to consumers and the financial system. Dudena warned that such products, although marketed as securities, carried potentially harmful characteristics associated with gambling.

This regulatory action highlights Brazil’s broader effort to strengthen financial oversight, protect investors, and ensure that derivatives markets remain aligned with legitimate economic activities rather than speculative betting practices.