New York State has filed a lawsuit against prediction market platform Kalshi, accusing the company of operating an unlicensed gambling business and seeking a court order to block its activities within the state. The lawsuit, which demands at least $36 billion in damages, intensifies an ongoing legal dispute over whether prediction markets should be governed by state gambling laws or federal commodities regulation.

New York's Legal Action Against Kalshi

On July 31, 2026, New York Attorney General Letitia James filed the lawsuit against Kalshi. The state alleges that Kalshi offered event contracts tied to sports, culture, and elections without securing the necessary state approvals.

New York argues that these contracts constitute gambling because they rely on uncertain outcomes that participants cannot influence or control. Furthermore, the lawsuit claims that Kalshi exposed state residents, including those under the legal gambling age of 21, to potential financial harm.

Alongside seeking financial penalties, restitution, and other remedies, New York has requested a temporary restraining order to immediately suspend Kalshi’s event contracts while the litigation proceeds. The filing suggests that total damages and penalties could reach at least $36 billion, a figure that will depend on further court proceedings and a comprehensive accounting. The state's official announcement can be found on the New York Attorney General's website.

CFTC Challenges State Authority

The federal Commodity Futures Trading Commission (CFTC), which oversees Kalshi as a registered Designated Contract Market, has intervened in the dispute. The agency filed a separate emergency motion seeking to prevent states from pursuing enforcement actions against federally regulated prediction market platforms.

Kalshi received its DCM designation from the CFTC in 2022, making it one of the few prediction market platforms to operate under federal commodities oversight. The designation allows the platform to list event contracts—financial instruments whose payouts are tied to the outcome of real-world events—subject to CFTC rules.

The CFTC contends that the Commodity Exchange Act grants it the authority to regulate prediction markets, thereby precluding states from applying their own gambling regulations to entities registered with the federal agency. The CFTC's motion arises as the court weighs a broader jurisdictional dispute regarding the extent to which states can restrict federally sanctioned prediction market platforms. The case tests a boundary that has remained largely unresolved since prediction markets began scaling beyond academic settings into mainstream financial products.

A Broader Regulatory Battle

Kalshi has encountered regulatory hurdles across multiple states. The platform has faced temporary restrictions in Michigan and Washington. Conversely, Minnesota took a different route after a judge issued a ruling that blocked the state's attempt to enforce prediction-market restrictions. In 2024, Kalshi also prevailed in federal court when an appeals court allowed its election contracts to proceed despite CFTC opposition, a decision that helped accelerate the platform's growth.

This dispute places Kalshi at the center of a growing conflict between federal and state regulators. The outcome could have far-reaching consequences for the broader prediction market industry, potentially shaping the operational framework for other platforms, including Polymarket and various blockchain-based markets operating under similar legal uncertainties. A ruling in New York's favor could embolden other states to assert gambling-law jurisdiction over federally registered venues, while a decision favoring the CFTC would reinforce the existing federal regulatory pathway.

Kalshi currently stands as the largest prediction market by trading volume. According to data from The Block, Kalshi recorded $33 billion in trades in June, significantly outpacing Polymarket, which reported $13.95 billion during the same period.

The central legal question moving forward is whether the rapidly growing prediction market sector will fall primarily under the jurisdiction of federal financial regulators or state gambling authorities.