NFL asks Supreme Court to let states regulate prediction markets

Background

The National Football League has picked a side in the fight over who gets to police prediction markets. On October 8, 2026, the league filed an amicus brief with the US Supreme Court supporting New Jersey regulators in their challenge to KalshiEX, LLC.

What the NFL is asking for

The NFL's core argument is simple. Contracts that let people wager on sports outcomes should be treated as gambling, not as financial swaps under federal oversight. If the justices agree, states could apply their own gambling rules to platforms like Kalshi.

Concerns about manipulation

The NFL's brief leans heavily on volume. On the first Sunday of the 2026 NFL season, more than $1.8 billion changed hands in NFL-related contracts on prediction markets. That figure made up over half of the $3.3 billion traded across all platforms that day. The brief also flags integrity risks. The NFL argued that some contracts could be manipulated through specific player actions, such as a missed field goal or an injury. When a bet hinges on one person's single moment, the incentive to tamper with that moment becomes a real concern.

Federal regulator vs. state regulators

The Commodity Futures Trading Commission, which oversees platforms like Kalshi at the federal level, has only 543 employees, according to the league's filing.

Age limits and high-risk bets

The league is also pushing on age limits. It wants a minimum betting age of 21. Kalshi currently allows users aged 18 and up. The brief also urges against allowing high-risk bets on platforms like Kalshi. The league has previously tried to get prediction market platforms to pull contracts it considered 'objectionable,' but those efforts ended without resolution.

How we got here

Federal circuit courts have issued conflicting rulings on whether states or federal regulators should oversee prediction markets. The tension traces back to the Supreme Court's 2018 decision in Murphy v. NCAA, which cleared the way for legal sports betting across the US.

What this means for Kalshi and the prediction market sector

The stakes for platforms like Kalshi are significant. Their model depends on operating under a single federal framework rather than a patchwork of state licenses. If the Supreme Court sides with New Jersey and its allies, that advantage could shrink considerably. The volume numbers show how much is on the line. If NFL-related contracts made up more than half of a $3.3 billion trading day, sports contracts are not a side business for these platforms. If states gain the power to regulate these markets, operators could end up navigating dozens of different regimes, much like traditional sportsbooks do today.