CFTC Warns Prediction Markets: Drop Sportsbook Odds

The Core Issue: Financial Derivatives vs. US Sports Betting

The Commodity Futures Trading Commission (CFTC) has issued a formal reminder to regulated prediction market platforms, instructing them against presenting event contract prices in the manner of traditional American-style moneyline gambling odds.

The federal regulator says such pricing could obscure market depth, mislead traders, and blur the line between derivatives and gambling. According to Bloomberg, the agency recently cautioned prediction market operators against displaying contracts using American-style betting odds, the familiar +150 and -200 format used by sportsbooks.

Instead, regulators want platforms to avoid presenting contracts in ways that make them resemble traditional gambling products.

Cents vs. Moneylines: Why the Format Matters

On a traditional prediction market, a binary-outcome contract is priced based on implied probability. A yes share trading at 10 cents reflects roughly a 10 percent chance of that outcome occurring. Instead of leaving it there, some platforms have been converting those cent prices into familiar sports betting odds — that same 10-cent share showing up on screen as +900, functionally identical to what a bettor would see quoted on a moneyline at a licensed operator.

The agency cited a study finding that presenting wagers in American-style odds format led to more risk-taking behavior among users compared to displaying implied probability directly. Misleading pricing displays, the divisions warned, could risk violations of federal prohibitions on manipulative devices.

Displaying pricing information for derivatives products in bookmaker-style odds is likely to mislead market participants about the nature of the transaction into which they are entering and may deprive users of access to indicia of market depth and pricing impact.

A Shot Across the Bow for Kalshi, Polymarket, and DraftKings

Kalshi and Polymarket are the two biggest prediction markets in the United States. Between the two of them, they carry the deepest liquidity, the broadest sports coverage, and the largest trading volume of any CFTC-regulated platforms in the country.

The American odds problem is concentrated in the sportsbook and DFS operators that entered prediction markets over the past year and brought their existing product interfaces with them. DraftKings Predictions is the clearest example, displaying sports contracts in the same format as its sportsbook.

A Kalshi spokesperson confirmed the exchange will comply with the CFTC’s directive by its deadline, saying the platform follows CFTC guidance as a federally regulated entity.

Polymarket did not respond to requests for comment. The guidance does not prohibit the contracts themselves but focuses on presentation to prevent any impression that they operate outside the derivatives framework.

The Bigger Legal Fight Over US Gambling Compliance

This advisory arrives against a backdrop of ongoing legal and regulatory friction. Several state authorities have challenged prediction market platforms, arguing that sports-related event contracts amount to illicit gambling operations that bypass state licensing requirements. Kentucky sued both Kalshi and Polymarket in June, alleging the platforms were operating illegal sports betting businesses without a license.

As prediction markets fight state gambling regulators across the country, the CFTC is telling the industry that if it wants event contracts treated as federally regulated derivatives, it cannot present them to consumers with standard sports betting odds. The product itself hasn’t changed. The presentation has. And regulators appear increasingly convinced that presentation matters.