What happened between the CFTC and Wisconsin over prediction markets?

The Commodity Futures Trading Commission sued Wisconsin to stop the state from shutting down prediction market platforms. The case centres on whether these platforms should be regulated federally as financial derivatives or treated as illegal gambling under state law.

Why is Wisconsin trying to ban prediction market platforms?

Josh Kaul argues that sports-based event contracts offered by platforms like Kalshi and Polymarket are effectively sports betting. Under Wisconsin law, most forms of online sports gambling are illegal, which is the basis for the state’s enforcement action.

Which companies are involved in the lawsuit?

The dispute involves platforms such as Kalshi, Polymarket, and Crypto.com, along with affiliates like Robinhood and Coinbase. These companies offer event-based contracts tied to outcomes like sports or elections.

What are prediction markets and how do they work?

Prediction markets allow users to trade contracts that pay out based on real-world outcomes, such as election results or sports scores. Platforms like Kalshi treat these as financial derivatives regulated by the CFTC rather than traditional betting products.

Why does the CFTC say it has authority over these platforms?

The CFTC argues that Congress granted it exclusive jurisdiction over derivatives markets to avoid inconsistent state-by-state rules. It claims that allowing states to regulate these platforms as gambling would undermine the federal framework.

What is the key legal question in this case?

The central issue is whether event contracts are financial instruments under federal law or gambling products under state law. This distinction will determine whether federal regulators or individual states have control over these markets.

How big is the prediction market industry involved in this case?

According to court filings, platforms like Kalshi generate over $1 billion annually from sports-related contracts. This highlights the scale of the market and why regulators are paying close attention.

How could this affect crypto-related platforms like Polymarket?

For platforms like Polymarket, which use crypto infrastructure, the outcome could shape how decentralised prediction markets are regulated in the US. A strict state-level approach could limit access, while a federal win could support broader expansion.

CFTC sues Wisconsin over prediction markets

Written by BloombergPublished Apr. 29 2026Last Updated Apr. 29 2026

The Commodity Futures Trading Commission sued Wisconsin on April 28, challenging the state’s attempt to block prediction market platforms operating under federal oversight.

Wisconsin Attorney General Josh Kaul had filed lawsuits days earlier against platforms including Kalshi, Polymarket, and Crypto.com, arguing their sports contracts violate state gambling laws.

“Our message to Wisconsin is the same as to New York, Arizona, and others: if you interfere with the operation of federal law in regulating financial markets, we will sue you,”

Said CFTC Chairman Michael Selig.

At the core of the dispute is whether event contracts, which pay out based on outcomes like sports or elections, are federally regulated derivatives or illegal betting under state law.

Wisconsin argues these contracts are effectively sports gambling, citing more than $1 billion in annual revenue from such products, while the CFTC maintains it has exclusive authority over these markets.

The lawsuit is part of a broader federal push, with the CFTC filing similar actions against multiple states in April as it seeks to prevent fragmented regulation across jurisdictions.

Legal analysts expect the case could escalate to the U.S. Supreme Court, where a ruling would determine whether prediction markets fall under federal financial law or state gambling control.