Kalshi swap claim covers under one percent of its contracts

A federal legal strategy that has survived two appeals courts, drawn the attention of the Supreme Court, and forced half a dozen states into litigation turns out to rest almost entirely on a contract type that accounts for less than one percent of what Kalshi actually trades. That is the number buried in a Gambling Insider reconstruction of Kalshi's trade record, and it is the number that changes how this fight looks from the outside.

The argument Kalshi has pressed in every courtroom is that its event contracts are swaps — instruments that fall under exclusive federal jurisdiction through the Commodity Exchange Act. If the contracts are swaps, the states have no authority to regulate them, regardless of what those states call them. Two federal appeals courts have now split on whether the sports contracts clear that bar. New Jersey has already taken the circuit split to the Supreme Court. And according to additional attorney appearances filed in the Ninth Circuit on September 8th, Kalshi appears to be preparing for another round there while the Supreme Court case develops.

The problem is the one percent. Swap treatment under federal law is not a loose category. It requires a specific legal structure: a bilateral agreement, a counterparty, defined terms of exchange. Most of Kalshi's volume does not fit that structure. The contracts that do — the ones with the strongest claim to being genuine swaps — represent a sliver of what actually clears on the platform. The rest, including the sports event contracts that have triggered every state lawsuit, sit in a category whose federal status is genuinely in dispute.

I want to be clear about where my own tendency runs here. I look for structural weaknesses before I look for strength, and I weight them heavier than I should. Eleanor has said this to me more than once. So I am adjusting when I say the following: the legal strategy is not necessarily doomed by the one-percent problem. Precedent does not always require volume. A contract does not need to be common to be legally valid, and one clean swap that survives appellate review could, in theory, set the standard for the rest. Courts have built broad rules on narrow cases before.

But the strategic exposure is real in a way that market observers haven't fully priced. Kalshi's preemption argument works only if the underlying classification holds. If the Supreme Court — or the Ninth Circuit on another pass — decides that sports event contracts do not constitute swaps, the entire federal shield collapses for the contracts that drive nearly all of Kalshi's revenue. The one percent is not a curiosity. It is the load-bearing wall.

Meanwhile, Citizens analyst Jordan Bender has argued this week that prediction markets have captured roughly eleven percent of combined wagering across sports betting and event contracts, and that cannibalization of traditional sportsbook handle appears to be slowing rather than accelerating. Bender's read is that prediction market marketing has expanded the overall pool of bettors rather than simply redirecting existing ones. That may be right. But an eleven-percent share built on contracts whose legal status remains unresolved is not a stable market position — it is a position that depends entirely on which court speaks next and what it says about a structure that covers less than one percent of the trades.