NBA Opens Official Data to Kalshi and Polymarket Under a New Integrity Framework
The NBA announced on Monday, October 26, 2026, new "preferred" prediction market arrangements with Kalshi and Polymarket. Under the deals, both platforms will be able to use official league data and intellectual property.
Prediction markets are exchanges where users trade contracts that pay out depending on whether a stated event occurs. Unlike a sportsbook, which takes the other side of a bet, these platforms match buyers and sellers, so the price of a contract reflects what traders collectively expect.
Kalshi separately announced the same day that it is becoming a Preferred Prediction Market Exchange of the NBA. Kalshi said the partnership will bring official NBA data to its platform.
The league also said it has signed a memorandum of understanding (a preliminary agreement setting out how two parties will work together) with the U.S. Commodity Futures Trading Commission (CFTC) about managing its prediction market relationships. It expanded its existing DraftKings agreement to include prediction markets. The NBA said more prediction market expansions with other partners will be announced soon.
The arrangements carry limitations on "permissible markets" and provide for information-sharing on suspicious trades and investigations. The league framed the package as an integrity framework alongside its commercial partnerships, as set out in its official announcement.
The deals arrive as both operators work through a difficult regulatory and commercial period. A Bloomberg analysis published October 7, 2026 found that most accounts on Polymarket lost money between January 2025 and April 2026. As of April 2026, according to Bloomberg reporting from April 25, Kalshi and Polymarket were facing a widening legal battle with U.S. states. A Reuters report dated October 22, 2026 put the combined political donations from Kalshi, Polymarket and their founders at at least $5 million, going to both Republican and Democratic recipients.
The broader context here is the shift in what a league license actually covers. Official play-by-play data and league IP have historically been the inputs for sportsbooks and fantasy products. Extending that access to exchanges that settle contracts on event outcomes changes the surveillance problem. An authoritative, timestamped feed gives integrity staff a common reference point when a trade looks wrong. The open questions are how the permissible-markets list will be applied in practice, and whether the information-sharing provisions can move fast enough to matter during a live game.
In my view, the more useful test of this framework will come in the next announced partnerships, not in this one. Each new counterparty will show whether the league's limits are a consistent standard or a set of bilateral terms. The CFTC memorandum adds a federal regulatory dimension to what had been treated largely as a commercial question, and the coming months will show how the two sets of obligations fit together.
For technologists, the practical upside is clear. Clean, licensed event data reduces the ambiguity that makes settlement disputes expensive, and it gives market operators a verifiable basis for surveillance tooling. Whether the arrangement delivers that depends on execution, and the league has said the next steps are still to come.
