CFTC Warns Prediction Markets Against American-Style Casino Odds

The Commodity Futures Trading Commission has told prediction market platforms to stop displaying their contracts using American-style gambling odds, a move that lands squarely in the middle of the ongoing fight over whether these exchanges are financial products or unlicensed sportsbooks. The agency sent a letter to CFTC-regulated entities this week reminding them that they must comply with U.S. derivatives law and avoid “deceptive” practices when listing, soliciting, or advertising their products.

At the center of the warning is the familiar plus-and-minus moneyline format bettors see at any licensed sportsbook. The CFTC says that format has no place on a regulated derivatives exchange, where contracts are supposed to be priced in cents on the dollar based on implied probability rather than potential payout multiples.

Why the Odds Format Matters to Regulators

On a traditional prediction market, a binary-outcome contract reflects a straightforward probability. A “yes” share trading at 10 cents implies roughly a 10 percent chance of that outcome happening. Several platforms have instead been converting those cent prices into the same odds format used by sportsbooks — that same 10-cent share appearing on screen as +900, which is functionally identical to a moneyline price a bettor would see on any regulated sports betting app.

The CFTC argues that conversion isn’t just cosmetic branding. The agency’s letter cites a study finding that presenting wagers in American-style odds led to more risk-taking behavior among users compared to showing implied probability directly. That distinction matters for how regulators classify these platforms: functioning as legitimate exchanges trading derivatives, or operating in practice much closer to unlicensed sports betting operators.

The agency reportedly wants firms to confirm receipt of the letter by the end of August, according to reporting on the matter, putting a real deadline on what has otherwise been an informal warning rather than a binding rule change.

No Enforcement Yet, But Pressure Is Building

Despite the pointed language, the CFTC has not announced any enforcement actions tied to the letter. As of this week, multiple platforms — including sports-focused prediction products — were reportedly still displaying contracts with moneyline and spread-style formatting rather than switching over to share-price displays. That leaves the guidance functioning more as a warning shot than an enforceable mandate, at least for now.

The timing isn’t coincidental. Prediction markets like Kalshi and Polymarket have expanded aggressively into sports-adjacent contracts over the past year, drawing legal challenges from state regulators and licensed sportsbook operators who argue the platforms are offering the same product as a licensed sportsbook without the same oversight, taxes, or consumer protections. Casting sports outcomes in cents-on-the-dollar pricing rather than moneyline odds has been one of the industry’s core arguments for why these products should be regulated as derivatives rather than as wagers under state gaming law.

By singling out the odds format itself, the CFTC is effectively telling these platforms that cosmetic tweaks won’t settle the underlying legal question. If the display looks and functions like a bet at a sportsbook promo page, regulators are signaling they’ll treat the resemblance as evidence, not coincidence.

Whether this warning leads to actual enforcement remains to be seen. For now, it adds another layer of uncertainty to an industry already navigating overlapping state and federal scrutiny, with sportsbook operators watching closely to see if regulators eventually force prediction markets to look — and operate — less like the betting apps millions of Americans already use to place bets on NFL odds and other major sports.