Wisconsin Takes on Prediction Market Platforms in Lawsuit Against Kalshi, Coinbase, and Others

The prediction market industry has long maintained that its products are legitimate financial instruments, rather than mere bets. However, Wisconsin has taken a different stance, filing a lawsuit against several major players, including Kalshi, Coinbase, Polymarket, Robinhood, and Crypto.com. The state's complaint argues that the marketing language used by these platforms is more akin to gambling than investing. According to Wisconsin Attorney General Josh Kaul, 'disguising unlawful conduct as lawful doesn't make it so.' The lawsuit raises a crucial question: are these contracts legitimate financial instruments under federal law, or are they simply bets subject to state gaming regulations? This question is likely to have far-reaching implications, as it could determine whether the growing prediction market industry is subject to federal oversight or state-by-state regulation. The Wisconsin lawsuit targets three separate ecosystems, including Crypto.com, Polymarket, and Kalshi, which partners with Robinhood and Coinbase to offer prediction market services to state residents. The state's legal theory is that the 'event contracts' offered by these platforms are essentially wagers, in which users pay to take a position on a real-world outcome and receive a fixed payout if they are correct. The lawsuit cites examples of traders buying contracts tied to NCAA tournament games, with winning positions paying out $1 and losing ones returning nothing. The state also points to the platforms' own marketing language, including Kalshi's claim to be 'the first nationwide legal sports betting platform' and Polymarket's description of itself as 'a platform where people can bet on the outcome of future events.' The lawsuit argues that the structure of these prediction markets falls squarely within the state's definition of a bet, regardless of how the products are labeled or who takes the other side of the trade. The platforms' revenue model, which involves charging transaction fees on each contract, is also likened to a casino taking a cut of wagers. The industry's defense relies on the argument that federal law preempts state regulation, with Kalshi arguing that its contracts are swaps listed on a regulated exchange and therefore subject to the exclusive jurisdiction of the Commodity Futures Trading Commission (CFTC). However, state courts have consistently taken a different view, with Nevada and New York both characterizing the contracts as indistinguishable from gambling. The Wisconsin lawsuit is the latest in a growing list of state challenges, which could ultimately force the Supreme Court to decide the issue once and for all.