TL;DR
- Gary Gensler filed an amicus brief arguing the CFTC lacks authority over sports-related prediction markets because they are not Dodd-Frank swaps.
- States, tribal gaming groups, the American Gaming Association, and Better Markets are challenging federal oversight as courts split across jurisdictions.
- The fight has intensified as prediction-market volume reached $28.4 billion in May, raising the stakes for tax revenue, platform access, and regulation across federally supervised and state-regulated betting channels.
Gary Gensler has moved directly into the prediction-market oversight fight, challenging the CFTC’s push to treat sports event contracts as federally regulated instruments. The former SEC and CFTC chair filed an amicus brief with the Sixth Circuit Court of Appeals arguing that the agency lacks authority over sports-related prediction markets. His position is striking because he once led the same derivatives regulator now seeking broader control. The core dispute is whether sports prediction contracts belong under state gambling law, or whether Washington can redefine them as swaps through federal market supervision during rapid market growth.
Courts Turn Prediction Markets Into a Jurisdictional Test
Gensler’s argument centers on Dodd-Frank and the meaning of a swap. He says Congress designed swaps for financial risk management, such as hedging crop prices, not for sports outcomes that rarely serve that purpose. That legal framing places him beside states, tribal gaming interests, and the gambling industry against the CFTC’s federal approach. The American Gaming Association, the Indian Gaming Association, tribal groups, and Better Markets have also challenged the swap classification. For them, the issue is not innovation but regulatory perimeter, tax authority, and who controls betting-linked products and long-term product accountability obligations too.
The court landscape is already fragmented. In April 2026, the Third Circuit sided with Kalshi and said New Jersey could not shut down prediction markets, giving federal preemption more weight. In March 2026, an Ohio federal judge ruled against Kalshi, allowing the state lawsuit to proceed in the Sixth Circuit. The Ninth Circuit has appeared more receptive to state challenges from places such as Nevada. That split makes prediction markets a Supreme Court-bound collision, especially as regulators, states, and platforms refuse to concede jurisdiction over sports contracts before the next nationwide election cycle intensifies demand.
The stakes have expanded with the market itself. Under Chairman Michael Selig, the CFTC has proposed its first formal prediction-market rules and sued states including Arizona, Illinois, and Minnesota to stop bans on platforms such as Kalshi and Polymarket. Minnesota fully criminalized prediction markets in May 2026, and the CFTC sued the next day. Trading volume hit a record $28.4 billion in May, with weekly volume near $2.9 billion. At that scale, oversight is becoming a revenue and market-structure fight, not an abstract legal disagreement anymore for crypto-native exchanges, brokers, and state treasuries alike now.
