NBA partners with Kalshi and Polymarket as official prediction markets

The NBA has struck deals that will make Kalshi and Polymarket the league’s preferred prediction markets, along with an agreement with a federal agency tasked with regulating those exchanges. Those agreements, announced Monday, are intended to provide “significant integrity protections for NBA-related markets,” including limitations on what can be offered on those exchanges, transparency when it comes to suspicious patterns by site users, and banning league and team personnel from making trade...