DraftKings and Flutter shares surge as court blocks Kalshi sports contracts

The vote was three to zero, and the language was precise: what Kalshi calls swaps, the Ninth Circuit calls sports gambling. That is not a semantic dispute. That is a jurisdictional wall, and on Friday it fell across Nevada with consequences that DraftKings and Flutter's share prices reflected within the session.

The court's reasoning turned on substance over label. Kalshi had argued that its sports event contracts were derivatives, regulated at the federal level by the CFTC, and therefore beyond the reach of state gambling law. The Ninth Circuit disagreed unanimously, finding that the economic reality of the instrument controls, not the name the exchange assigns to it. If the contract pays out on the outcome of a sporting event, it is a sports bet. Nevada law applies. The CFTC's designation does not displace it.

This creates a genuine split. The Third Circuit reached the opposite conclusion in the New Jersey litigation, holding that CFTC authority preempts state regulation of these contracts. Two federal appellate courts, same instrument, opposite answers. The Fourth Circuit has not yet weighed in. What that split produces, eventually, is a Supreme Court review — though the analysts tracking this are pricing in somewhere between ten and twenty-two months before any resolution arrives. That is a long time for an industry to operate under two different legal regimes depending on which side of a state line a customer sits.

The near-term beneficiary is straightforward. Kalshi is already geofenced out of Massachusetts, Nevada, Michigan, and Washington. Every additional state that reads the Ninth Circuit ruling as permission to enforce its own gambling statutes narrows the footprint of a direct competitor. DraftKings and Flutter hold licences in those states. The handle that cannot flow to Kalshi has to go somewhere.

I have watched incumbents celebrate regulatory wins before. The celebration usually lasts until the competitor finds the workaround, and prediction market operators have shown a consistent willingness to litigate until they locate one. The Ninth Circuit left the election contract question unresolved, sending it back to the district court — which means Kalshi retains operational room on at least one contract category while the sports question works its way toward a final answer.

The Sportradar expansion with Polymarket is the detail in this story that the share price movement obscured. Polymarket is not waiting for legal clarity. It is building data infrastructure across the Bundesliga, EuroLeague Basketball, tennis Grand Slams, and additional properties, extending a partnership that already covered the ATP Tour, MLB, NFL, MLS, and UFC. That is a company building toward a product, not a company in retreat. What Polymarket cannot offer today in Nevada, it is positioning to offer the moment a different legal environment permits it.