The legal battle surrounding the fast-growing prediction markets sector intensified on Friday as New York became the latest state to move against the industry, filing a petition that accuses market leader Kalshi of operating an unlicensed gambling platform. The case adds another front in a widening jurisdictional conflict that could determine whether prediction markets—platforms where users trade contracts tied to the outcome of real-world events—are regulated as federally overseen financial instruments or state-licensed gambling products.

New York alleges that Kalshi, which runs one of the country's most prominent prediction markets, facilitates illegal wagering on sports, elections, and cultural events without holding a proper license from the New York State Gaming Commission. The state is asking the court to impose civil penalties of $100,000 for each unauthorized sports-betting offer—a figure the filing estimates could reach approximately $36 billion in total.

The petition arrives during a period of explosive growth for Kalshi. In May, the company reported that its annualized trading volume had tripled over six months to $178 billion, alongside a $1 billion fundraise that valued it at $22 billion. Kalshi is now reportedly exploring another funding round that could push its valuation toward $40 billion. Kalshi's surge has paralleled broader interest in event-driven trading, which drew mainstream attention during the 2024 U.S. election cycle. Competitor Polymarket, which operates offshore and settled with the CFTC in 2022 for $1.4 million over related charges, also reported billions in monthly volume during that period.

Federal Court History

Friday's filing comes nine months after Kalshi initiated its own legal offensive, suing New York's gaming regulator in federal court. In that proceeding, Kalshi sought a temporary restraining order and preliminary injunction to prevent New York from enforcing its gambling laws against the company, but the court denied both requests in July. Kalshi subsequently sought an emergency injunction pending appeal, which was also denied.

New York's Regulatory Leverage

The petition lands amid an escalating showdown between state regulators and the Commodity Futures Trading Commission (CFTC). At its core, the dispute centers on federal preemption—whether the CFTC's authority to regulate derivatives contracts overrides states' power to enforce their own gambling statutes. As more states move to restrict prediction markets within their borders, the federal landscape has shifted under CFTC Chairman Michael Selig, who abandoned the agency's earlier proposal to ban political and sports event contracts. Instead, the CFTC moved to classify prediction markets as federally regulated derivatives, asserting exclusive authority over event contracts on exchanges like Kalshi. The agency has backed these platforms in disputes with state regulators, prioritizing enforcement against insider trading and fraud rather than treating the operations as gambling enterprises subject to shutdown.

Following news of New York's petition, Selig stated in a social media post that the CFTC has filed its own lawsuit to block New York's action and will continue defending federal jurisdiction over prediction markets.

Expert Analysis: An "Existential Threat"

Daniel Wallach, a prediction market and legal expert at Wallach Legal, said New York's case poses a serious risk to Kalshi, partly because the company is headquartered in the state and therefore subject to unusually broad enforcement powers.

"It's the one jurisdiction that vests the New York State Attorney General with nationwide disgorgement powers… [and] allows the attorney general to claw back ill-gotten gains associated with that illegally operating business from wherever the transaction occurs," Wallach said.

Wallach noted that states tend to achieve better outcomes against Kalshi when they litigate on their own turf rather than allowing cases to center on federal-law arguments. He pointed to the state of Washington's recent victory, where a court order blocked Kalshi from offering its event contracts. Nevada, Michigan, and Massachusetts have secured similar results in their respective courts. The pattern of state-level injunctions has effectively fragmented the national market for prediction platforms, leaving operators to navigate a patchwork of enforceable jurisdictions.

Regarding the $36 billion penalty estimate, Wallach described it as a "very conservative estimate" of Kalshi's potential liability, given that the attorney general could also invoke state law to pursue funds tied to trades conducted across the entire country. He characterized the possibility as an "existential threat" to the company.

"$36 billion is more than the reported value of the company, and this is not a hyperbolic number," he said.