Prediction markets like to speak the language of finance: probabilities, event contracts, price discovery and collective intelligence. The promise is to turn uncertainty into a tradable signal.
For Brazil, still dealing with the hangover from the online-betting boom, that narrative should sound less like innovation and more like a warning.
Kalshi has already tested the waters with Brazilian investors through a partnership with XP International. The pitch is to allow investors to trade economic, political and financial events as a new asset class. In well-regulated markets, there is merit to that idea. A contract on inflation, interest rates or elections can produce useful information.
But the line between a market and a wager is thin. A Wall Street Journal investigation into Polymarket showed the less flattering side of the business: creators allegedly paid to simulate trades, fake wins and videos designed to go viral, often without adequate transparency around sponsorship. A product sold as collective intelligence appeared on social media as a TikTok-native casino.
Brazil knows this script. Online betting arrived with the language of entertainment, technology and formalization. Within a few years, it had taken over football, advertising, influencers and payment rails. Only later came the concerns over household debt, addiction, money laundering and illegal operators.
Prediction markets will argue they are different. Sometimes they are. A financial contract traded by qualified investors can be regulated as a derivative. But a wager on an election, reality show, celebrity or sporting event, pushed to retail users by influencers and promises of easy money, is just a bet by another name.
That distinction should guide Brazilian regulators. If it looks like a financial product, it should come with suitability rules, supervision, conduct standards and controls against manipulation. If it behaves like gambling, it should follow gambling rules. And if it relies on simulated gains or disguised advertising, it should be treated as a red flag.
The mistake with online betting was allowing the market to grow before the rules were in place. Once football clubs, fintechs, creators and consumers had already been captured, regulation became cleanup. Brazil does not need to repeat the experiment.
Prediction markets can have value. But not when they arrive wrapped in dopamine, virality and the promise of easy money. If they want to be information markets, they should accept the discipline of financial markets. If they sell the thrill of a casino, Brazil should treat them as a risk — not as a novelty.
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