The city of Baltimore has filed a lawsuit against prediction market platforms Kalshi and Polymarket, alleging that their sports event contracts constitute illegal gambling under state law. The case directly challenges the prediction market industry and raises questions about where event contracts end and sports betting begins.
Baltimore’s legal action centers on whether contracts offered by Kalshi and Polymarket, which allow users to wager on the outcomes of sporting events, cross the line from regulated prediction markets into illegal gambling.
What the Lawsuit Targets
Baltimore’s filing targets both platforms for offering contracts tied to sports event outcomes. The city argues that these products function as sports bets rather than legitimate prediction market instruments.
Kalshi operates as a federally regulated exchange under oversight from the Commodity Futures Trading Commission (CFTC). Polymarket operates in the crypto-based prediction market space and has previously faced regulatory scrutiny from U.S. authorities.
The Broader Regulatory Debate
The lawsuit lands at a pivotal moment for the prediction market industry. Kalshi has been at the center of an ongoing regulatory dispute over whether event contracts tied to sports should be permitted on regulated exchanges.
The CFTC previously attempted to block Kalshi from listing certain event contracts, including those related to elections. A federal court ruled in Kalshi’s favor in that dispute. But the question of sports-related contracts remains unresolved.
Prediction markets allow participants to buy and sell contracts based on the outcome of future events. When those events involve sports, the line between a prediction market contract and a traditional sports bet gets thin, and Baltimore’s lawsuit targets that gray area.
Why Baltimore Is Taking Action
Baltimore’s challenge reflects growing concern among state and local governments that prediction market platforms may be sidestepping state gambling laws. Many states have built regulatory frameworks for sports betting, complete with licensing requirements, tax obligations and consumer protections.
If prediction market platforms offer functionally identical products without meeting those same requirements, it creates a competitive imbalance with licensed sportsbook operators. It also raises consumer protection concerns, as prediction market users may not receive the same safeguards available to licensed sports bettors.
The city’s position is straightforward: regardless of how these contracts are labeled or structured, their practical effect is to allow wagering on sports outcomes. That falls under state gambling regulation.
Potential Impact on the Prediction Market Industry
A ruling against Kalshi and Polymarket could force prediction market platforms to restrict their sports-related offerings or seek state-level gambling licenses.
The case also carries implications for the CFTC’s authority over event contracts. If courts determine that sports event contracts constitute gambling under state law, it could limit the federal regulator’s ability to approve such products on regulated exchanges.
For Polymarket, the lawsuit adds another layer of legal exposure. The platform already navigates a complex regulatory environment where crypto assets and prediction markets intersect.
What Comes Next
The legal proceedings are expected to take months to play out. Both Kalshi and Polymarket will need to argue that their sports event contracts are distinct from traditional sports betting.
Baltimore’s lawsuit represents one of the most direct municipal challenges to the industry’s sports-related offerings. The outcome could set a precedent that shapes how prediction markets operate across the country. If Baltimore prevails, other cities and states may follow with similar legal actions.
Both platforms continue to operate while the case moves forward. The dispute highlights the unresolved tension between financial market innovation and established gambling regulations a tension that courts and regulators will likely deal with for years.
