Coinbase prediction market volumes reach $200m as legal map hardens

When the Missouri Gaming Commission sent Kalshi a cease-and-desist letter in October and gave the company until October 16 to either stop operating or obtain a state gambling license, pay state taxes, and restrict access to users under 21, it was making an argument that several state attorneys general have now made in sequence: that what Kalshi sells is sports betting, and that the Commodity Exchange Act does not change that.

Kalshi's response was to sue.

The lawsuit against Missouri Attorney General Catherine Hanaway and state officials is built on two pillars: that the Commodity Exchange Act grants the CFTC exclusive jurisdiction over swaps traded on designated contract markets, and that the Supremacy Clause makes that federal grant dispositive against conflicting state law. Missouri's counter is direct — the contracts Kalshi offers do not meet the CEA's definition of swaps, and most federal courts that have examined the question have agreed.

That last claim is doing real work, and Missouri is not wrong to make it. The Ninth Circuit, in Blue Lake Rancheria, ruled that IGRA applies to sports-event contracts on tribal lands and rejected Kalshi's UIGEA carveout argument. The Western District of Wisconsin reached the same conclusion. The First Circuit is scheduled to hear oral arguments in Robinhood Derivatives' appeal of a Massachusetts dismissal, a case that, for now, turns on threshold justiciability rather than federal preemption on the merits. The Seventh Circuit has granted Kalshi's petition to appeal the Wisconsin tribal case, which means two federal circuits will eventually weigh the same underlying conflict. The legal map is hardening, and most of what has hardened so far has not gone Kalshi's direction.

The consensus read is that Kalshi's preemption argument is weakening under accumulated judicial weight. I don't think that's where this lands, and here is why.

Every case that has gone against Kalshi has turned on a specific application — tribal land, state sports betting classification, threshold jurisdiction — without any of those courts issuing a definitive ruling on whether the CEA preempts state gambling regulation as a structural matter. The First Circuit has explicitly flagged it is not deciding the broader preemption question yet. The Seventh Circuit's decision to grant Kalshi's petition means at least one more federal circuit will examine the IGRA-UIGEA conflict directly. Courts declining to rule in Kalshi's favor on narrow grounds is not the same as courts ruling against the CEA preemption theory at its core.

I have watched preemption fights in other regulatory contexts where the consensus mispriced duration. The theory looked dead at the district level for years before it found its circuit. Kalshi is operating at a $40 billion valuation with $1 billion in fresh capital and a portfolio of active lawsuits. That is not a company managing decline. That is a company funding a legal strategy designed to reach a court that will decide the structural question, not the specific one.