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Missouri Attorney General Directs Kalshi and Polymarket to Cease Operations

The Missouri Attorney General has reportedly issued an order for prediction market platforms Kalshi and Polymarket to stop offering their services within the state's borders.

PredictionSites Newsroom · 21 September 2026

The Attorney General of Missouri has reportedly instructed prediction market operators Kalshi and Polymarket to discontinue their activities within the state. This development marks a notable intervention by a state authority regarding the availability of prediction market platforms to its residents.

Prediction markets allow participants to bet on the outcome of future events, with contract prices reflecting the collective probability assigned by the market to a particular outcome. Kalshi is a regulated prediction market that offers event contracts on a variety of topics, operating under the oversight of the Commodity Futures Trading Commission (CFTC). Polymarket, on the other hand, operates as a decentralised prediction market, often focusing on political, economic, and cultural events.

The directive from the Missouri Attorney General could stem from regulatory concerns regarding the classification and legality of these platforms' offerings within the state's jurisdiction. The operation of prediction markets often navigates complex legal frameworks, particularly concerning their distinction from traditional gambling or financial derivatives.

Such actions by state regulators can significantly impact the accessibility of these platforms for users in specific regions. This situation highlights the ongoing discussions and challenges prediction markets face in establishing a clear and consistent regulatory environment across different jurisdictions.

Reported first by The Derrick read the original report. This article was written by the PredictionSites newsroom from that report.