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Adam Silver Says Giannis Antetokounmpo’s Kalshi Stake Meets NBA’s De Minimis Rule

The league is applying its de minimis ownership rule to prediction platforms it treats like sportsbooks.

Overview

  • Silver said Antetokounmpo’s investment is much smaller than 1%, which keeps it within the collectively bargained limit for player stakes in wagering or prediction companies.
  • The NBA currently views prediction markets essentially the same as sportsbooks, with Silver citing fast growth and ongoing integrity monitoring across U.S. and international betting markets.
  • Silver noted the legal framework for prediction markets may ultimately be decided by courts and Congress, as states challenge the sector and lawmakers float proposals such as the Public Integrity in Financial Prediction Markets Act of 2026.
  • Kalshi says active NBA players are barred from trading on NBA-related markets under its terms, after more than $23 million in contracts tied to Antetokounmpo’s trade speculation changed hands around the deadline.
  • The NBA hosted Kalshi and Polymarket executives at its All-Star Tech Summit but has not announced league partnerships with prediction platforms, even as other sports properties explore deals.