Why did the NFL file a brief in the Kalshi Supreme Court case?

The National Football League (NFL) filed an amicus brief urging the US Supreme Court to review Kalshi’s sports-event contracts because the league argues they raise concerns about game integrity and state gambling regulation.

What is Kalshi’s legal dispute with New Jersey about?

Kalshi (a prediction-market platform) is involved in a dispute over whether New Jersey can enforce its gambling laws against sports-event contracts offered on the platform, or whether federal derivatives law takes precedence.

What trading volume did the NFL cite in its filing?

The National Football League (NFL) cited $1.8 billion in NFL-related trading from $3.3 billion traded across prediction markets on the first Sunday of the season.

Law and legal

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NFL backs New Jersey in Supreme Court fight over Kalshi

Q: What protections does the NFL want for sports prediction markets?

The National Football League (NFL) called for safeguards covering vulnerable contracts, minimum trading ages and cooperation with sports leagues to address the use of insider information.

Q: What could the Supreme Court’s decision mean for prediction markets?

The Supreme Court’s decision in the Kalshi dispute could clarify whether states can regulate sports-event contracts offered by federally registered prediction-market platforms.

Written by Brie CarterPublished Oct 8, 2026, 11:48 PM

The NFL has filed a brief urging the US Supreme Court to review a legal dispute involving Kalshi’s sports-event contracts.
The case centres on whether federal oversight of prediction markets can override state gambling laws.
The outcome could shape how prediction-market platforms offer sports-related contracts across the United States.

The National Football League (NFL) has asked the US Supreme Court to review Kalshi’s sports-event contracts, arguing they should face state gambling rules rather than federal derivatives oversight.

New Jersey’s petition challenges a Third Circuit ruling that blocked enforcement of state gambling laws against Kalshi’s sports-event contracts, creating a dispute over federal and state authority.

“These bets, in the NFL’s view, pose the greatest threats to game integrity, because many can be manipulated by a single person, especially if known in advance,” the NFL said in its amicus brief.

The league’s filing cited $1.8 billion in NFL-related trading from $3.3 billion across prediction markets on the first Sunday of the season.

The NFL also called for safeguards covering vulnerable contracts, minimum trading ages and cooperation with sports leagues over insider information.

The dispute centres on whether sports-event contracts qualify as financial swaps under the Dodd-Frank Act, which governs federally regulated derivatives markets.

The NFL argues state-regulated sportsbooks provide stronger protections against manipulated bets and misuse of confidential information than prediction-market platforms currently offer.

The Supreme Court’s decision could determine whether states can regulate sports-event contracts offered through federally registered prediction markets.