Supreme Court considers regulating prediction markets amid high betting volume

Supreme Court weighs prediction market regulation as Alito retirement bets near $6 million

Nearly six million dollars has moved on a single question: when will Samuel Alito leave the bench. That number is not the story. The story is that the court those bettors are watching is the same institution that will likely decide whether the markets they're using are legal.

Josh Kirschner, a partner at Holland & Knight, put the structural problem plainly in comments to Bloomberg Law. The Supreme Court sits simultaneously as the subject of active prediction market contracts and as the probable final arbiter of whether those contracts can exist. Kirschner warned that the longer the court takes to resolve the regulatory question, the more embedded these platforms become — his phrase was "too big to fail, in a way." That is a lawyer's way of saying the delay is not neutral. It has a direction.

The regulatory architecture underneath all of this has been moving fast. The CFTC, which licenses Kalshi and oversees Polymarket, has been asserting jurisdiction in federal courts from Louisiana to Utah, filing preemption suits against state gaming authorities that treat event contracts as unlicensed gambling. The Fifth Circuit, which covers Louisiana, has now seen the sharpest federal-state confrontation yet. Meanwhile, CFTC enforcement director David Miller confirmed at the Next Predict Summit in New York that insider trading rules apply to prediction markets — a position the agency formalized in a February advisory — and the agency has already brought two cases to prove it.

What the market on Alito's retirement actually represents, legally, is the question that Kirschner's comment opens without quite closing. A contract resolving on a federal judge's departure is not a sports event contract. It does not implicate the same jurisdictional fights that have consumed Kalshi's legal team in three states. But it is regulated by the same agency, traded on the same platforms, and will ultimately be evaluated under the same statutory framework: whether event contracts on designated contract markets fall within CFTC jurisdiction, and whether state law can reach them.

The preemption argument that Kalshi has been running in federal courts since Friday rests on the Supremacy Clause and the Commodity Exchange Act's definition of what constitutes a lawfully traded event contract. The Supreme Court has not taken up that question yet. Kirschner is right that every month it doesn't, the market grows. Polymarket's US operation logged over seventy-four million trades. Robinhood's event contract volume set records last quarter. Coinbase is projecting a revenue figure from this segment that its derivatives desk would have considered implausible three years ago.

I don't read the delay as the court being indifferent. I read it as the court watching the legal landscape consolidate below it. The Fifth Circuit conflict gives it a vehicle if it wants one. The question is whether the majority believes the CFTC's preemption position is strong enough to deserve deference, or whether it sees this as a gap in Dodd-Frank that Congress, not the agency, needs to fill.