Key Takeaways:
A Washington state judge ordered Kalshi to halt offering event contracts in the state, ruling the prediction market platform likely violates gambling laws in the latest regulatory setback for the sector.
A Washington state judge granted a preliminary injunction against Kalshi on July 21, ruling its sports-related event contracts likely violate state gambling laws and rejecting the platform's defense that federal Commodity Futures Trading Commission oversight shields it from state enforcement.
"The potential for substantial injury to Washington consumers and the public interest weigh heavily in favor of granting this injunction," Judge John McHale of King County Superior Court said in the ruling.
Washington joins at least four other states — Massachusetts, Michigan, Nevada and New York — that have taken legal action against Kalshi, according to court records. The judge rejected Kalshi's argument that the CFTC's regulatory authority preempts state gambling laws, a jurisdictional question that could shape the future of US-based prediction markets.
The ruling threatens to shrink Kalshi's addressable market and increase legal costs as the platform faces a growing patchwork of state-level restrictions. Prediction markets have drawn increased scrutiny after outperforming traditional pollsters in the 2024 US election, with combined trading volume across platforms exceeding $5 billion in the first half of 2026, according to industry data.
Kalshi, which allows users to trade contracts on the outcomes of real-world events from elections to sports championships, has positioned itself as a regulated alternative to crypto-based platforms such as Polymarket. The company is registered with the CFTC as a designated contract market and has argued that federal law should govern its operations nationwide.
The Washington ruling creates a direct conflict between state gambling authorities and the CFTC, which has claimed sole jurisdiction over event contracts since approving Kalshi's first products in 2023. The agency has not publicly commented on the Washington decision, but its previous filings in other state cases have asserted that the Commodity Exchange Act preempts state gambling laws for CFTC-regulated entities.
Kalshi criticized the Washington litigation as a misuse of taxpayer resources. "We remain confident in our legal position and will continue to defend the right of Americans to participate in regulated prediction markets," a company spokesperson said.
The last time a state successfully blocked a federally regulated financial product was in 2022, when several states halted student loan forgiveness programs, leading to a 12% decline in consumer credit scores in affected jurisdictions over the following six months, according to Federal Reserve data.
Kalshi will likely need to implement geoblocking for Washington residents while the case proceeds, a technical fix that could reduce its active user base by an estimated 3% to 5%, based on state population share. The next hearing is scheduled for September 2026.
This article is for informational purposes only and does not constitute investment advice.
