NBA's Kalshi and Polymarket Deals Add Market Limits and Suspicious-Trade Information-Sharing

The NBA announced Monday, October 26, 2026, preferred prediction market arrangements with Kalshi and Polymarket. The deals limit "permissible markets" and set up information-sharing on suspicious trades and investigations, which the league presents as an integrity framework. Both platforms can use official league data and IP. The league said more partners will be announced soon.