NBA Opens Its Doors to Kalshi and Polymarket With Strict Rules

The NBA just handed Kalshi and Polymarket a coveted seat at the table, naming both platforms preferred prediction-market exchanges on Oct. 26, 2026, while securing something traditional betting partnerships rarely offer: direct oversight of which contracts can be traded. The agreements, reported by ESPN and The Athletic , give the NBA approval rights over categories of contracts the exchanges can offer. That’s a notable departure from conventional sportsbook arrangements, where leagues generally exercise less direct influence over available wagers. In its Oct. 26 announcement , Kalshi explained how official data will shape trading outcomes: “Through this partnership, we’ll integrate official NBA data, distributed by Sportradar, into the operation and settlement of authorized NBA markets on Kalshi.” The exchange also emphasized its business model, stating, “We don’t win when you lose…

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