NFL Backs States at Supreme Court to Block Kalshi Sports Prediction Contracts

The NFL filed an amicus brief with the U.S. Supreme Court this week urging the justices to hear New Jersey's challenge against Kalshi, arguing that the platform's sports prediction contracts constitute gambling rather than CFTC-regulated commodity swaps. The move formally aligns the league with a growing coalition of states seeking to strip federal regulatory cover from one of the fastest-growing segments of the prediction market industry.

The filing arrives after months of failed partnership negotiations between the NFL and Kalshi, a detail that sharpens the political edge of the league's legal posture. Kalshi holds CFTC authorization to offer event contracts and has expanded aggressively into sports-linked prediction markets, drawing scrutiny from leagues that have spent years building exclusive relationships with licensed sportsbooks. The NFL's decision to file at the Supreme Court level, rather than continuing quiet diplomacy, signals that those negotiations have definitively collapsed.

At the center of the dispute is a classification question with enormous financial stakes. The CFTC, which regulates derivatives and commodity swaps, authorized Kalshi's event contracts on the theory that they function as financial instruments providing price discovery, not as gambling products subject to state gaming law. The NFL's amicus brief contests that framing directly, arguing the sports contracts are gambling in substance regardless of how they are labeled for regulatory purposes. If the Supreme Court agrees to hear the case and ultimately sides with New Jersey, it could force Kalshi and similar platforms to seek state gambling licenses, a far more fragmented and restrictive regulatory path.

"The NFL filed an amicus brief urging the Supreme Court to hear New Jersey's case, arguing Kalshi's sports contracts are gambling, not CFTC-regulated swaps."

NFL, via amicus brief

Kalshi and prediction market advocates push back on that characterization. Their position is that event contracts are legitimate derivatives, properly within the CFTC's jurisdiction under the Commodity Exchange Act, and that sports leagues' opposition is less about integrity than about protecting the exclusive betting partnerships and associated revenue those leagues have negotiated with traditional sportsbooks. The CFTC's own authorization of Kalshi's products lends weight to that argument: a federal regulator has already reviewed and approved the contracts the NFL now calls gambling.

The NBA is reportedly weighing its own formal response to prediction markets, which would widen the sports industry front against platforms like Kalshi. A coordinated push from major professional leagues, combined with state attorneys general backing the Supreme Court petition, would create political pressure on the Court to grant certiorari even if the underlying legal question is genuinely contested. For the prediction market sector, the risk is not just one adverse ruling but a precedent that redraws the boundary between derivatives regulation and state gambling law across every sports-linked contract currently trading.

The broader context is a regulatory gray zone that has persisted since prediction markets re-emerged as a serious financial product. The CFTC has historically treated event contracts as within its remit when they meet the definition of commodity swaps, but Congress never explicitly addressed sports outcomes in that framework. Courts and regulators have applied different standards depending on the contract structure, leaving platforms like Kalshi operating under federal authorization while state governments argue they are running unlicensed gambling operations. The Supreme Court taking up this case would force a definitive answer to a question that has been deferred for years.

For market participants, the immediate practical question is whether the Court grants certiorari. If it does, Kalshi's sports contracts face an uncertain legal status for the duration of litigation, a period that could extend well into 2027. If the Court declines, the lower court rulings that have generally favored federal jurisdiction over event contracts would remain in place, and the NFL's legal campaign would shift back to the legislative arena. Either outcome will set the terms of the prediction market industry's next phase of growth, or constrain it.