NBA signs Kalshi and Polymarket as official prediction market partners, with a CFTC watchdog attached

DraftKings, already an NBA sports betting partner, had its deal expanded to cover prediction markets too, now carrying the title of Authorized Prediction Market Operator. The league says more operators will be added in the coming weeks. This wasn’t a snap decision. Commissioner Adam Silver had been saying for months that the NBA viewed prediction markets through the same lens as traditional sports betting, and the league spent the spring and summer in talks with both platforms rather than picking one the way MLB did with Polymarket. The run-up had its share of friction too: Giannis Antetokounmpo’s equity stake in Kalshi, announced back in February, drew immediate criticism on social media over the idea of an active player holding ownership in a platform trading contracts tied to his own league, even with Kalshi barring him from trading NBA-related markets himself. LeBron James followed with his own Polymarket partnership announcement in September.

The integrity framework attached to the deal reads like a direct response to exactly that kind of scrutiny. It restricts which NBA-linked markets are allowed to exist in the first place, bars league and team personnel outright from trading contracts tied to NBA events, and requires both exchanges to hand over information on investigations and suspicious trading activity. Authorized operators like DraftKings face an extra layer on top of that: integrity obligations and market restrictions mirroring the limits already placed on the league’s sports betting partners.

In exchange for accepting those conditions, Kalshi and Polymarket get something neither could simply buy on the open market: official NBA intellectual property rights, marketing and promotional access across US media channels, and league data piped through Sportradar, the NBA’s official data distribution partner, to actually settle their contracts. That data pipeline matters more than it might look at first glance, since a prediction market needs a reliable, licensed source of real-time results to resolve contracts accurately, and running on unofficial or scraped data has been a recurring sore point for operators trying to work in this space without a league’s blessing, a gap that has shaped much of the volume race between the two platforms so far.