Federal Judge Temporarily Blocks Arizona From Prosecuting Prediction Market Platform Kalshi

A federal judge in Arizona has issued a temporary restraining order blocking the state from pursuing criminal charges against Kalshi, a CFTC-regulated prediction market platform. District Judge Michael Liburdi of the District of Arizona ruled on Friday that Arizona must halt a scheduled Monday arraignment of Kalshi, preventing the state from enforcing its gambling laws against any contracts listed on federally regulated designated contract markets.

Arizona had announced plans to file 20 criminal charges against Kalshi last month, alleging the platform violated state gambling laws by offering what officials described as illegal betting products. The restraining order came in direct response to a motion filed by the Commodity Futures Trading Commission, which has been actively defending the legality of prediction markets under federal oversight.

CFTC Chair Michael Selig praised the ruling, warning that Arizona's use of criminal law against federally compliant companies sets a troubling precedent. The CFTC has filed lawsuits against Arizona and two other states, arguing that event contracts and prediction markets are classified as swaps under federal law, placing them squarely under the CFTC's jurisdiction and making state interference legally questionable.

The broader legal battle over prediction market regulation has produced inconsistent outcomes across courts. A Nevada state court previously allowed the Gaming Control Board to temporarily block Kalshi's operations, while the Third Circuit Court of Appeals ruled earlier this week that prediction markets fall under CFTC authority. The Ninth Circuit, which declined to intervene in the Nevada matter, is set to hear consolidated arguments from multiple parties in the coming week.

Notably, Judge Liburdi granted the CFTC's motion just two days after rejecting Kalshi's own request for a preliminary injunction against Arizona, underscoring the significance of federal regulatory standing in the ongoing dispute over who governs the fast-growing prediction market industry.