Polymarket traders price 52% odds Supreme Court takes prediction market case
Traders on Polymarket are pricing a 52% probability that the Supreme Court will hear a case involving prediction markets, following a Ninth Circuit ruling that found sports event contracts on Kalshi's designated contract market constitute sports gambling. The ruling did not declare all prediction markets gambling, nor did it prohibit contracts on elections or interest rates. The case centers on whether such contracts fall under CFTC oversight or state gambling prohibitions. The circuit split with contrary federal rulings raises the likelihood of Supreme Court review.
The Ninth Circuit ruling strips the legal shield that let Kalshi scale nationally without state gambling licenses. Kalshi must now geofence Nevada or face state enforcement that federal registration no longer blocks. Polymarket and Novig face identical exposure because the court's reasoning reaches any platform offering sports-linked contracts.
The circuit split with the Third Circuit raises Supreme Court review odds, but that timeline stretches across months of uncertainty while state bans accumulate. Connecticut has already filed suit on similar grounds. Each new state loss emboldens the next attorney general, and Kalshi's legal spend compounds across parallel cases. Traders hold positions whose legality shifts with geography, not regulation, until a final federal ruling lands.