The Commodity Futures Trading Commission has warned prediction-market operators that displaying contract prices in American sportsbook odds format may violate federal rules against manipulative practices.
A joint letter from two divisions of the regulator states that the plus-and-minus format (such as -110 or +200) misleads traders about the nature of the transaction and obscures market depth. The CFTC requires platforms to display derivative prices in nominal or percentage terms, not as event wagers. Regulated entities must confirm receipt of the notice by 31 August and review their interfaces, marketing and partner practices.
The regulator frames the issue as consumer protection, not stylistic preference. The letter notes that confusion between derivatives and sportsbook products can be exploited to steer clients toward 'products with high margins and non-market pricing'. A footnote cites research showing that American odds format encourages riskier bettor behaviour.
The letter arrives amid legal battles between the CFTC and several states. The regulator has sued New York, New Mexico and Kentucky, asserting exclusive federal jurisdiction over event contracts. Courts have not settled on a uniform position: rulings in Michigan and Nevada forced platform Kalshi to restrict access to certain contracts, while operators won in New Jersey, Arizona and Tennessee.
The demand to drop sportsbook formatting is an attempt by the CFTC to draw a clear line between regulated derivatives and betting. Critics argue the commission's stance has effectively legalised wagering nationwide, including in states that ban gambling.
