The U.S. Commodity Futures Trading Commission (CFTC) stated that it will consider the opinions of sports leagues when assessing the risks of forecast market contracts, following the NFL's call for platforms to tighten related trading rules. The NFL has reportedly sent a letter to Kalshi and Polymarket, requesting them to avoid listing contracts that are easily manipulated or whose outcomes can be predetermined, such as contracts related to single game events (e.g., whether a first pass is missed, whether a free throw is made), draft results, roster decisions, and broadcast-related content. The league also specifically pointed out that markets related to foul calls and player injuries could create incentives for manipulation, thereby affecting the fairness of the game. CFTC Chairman Michael Selig stated that the regulator will "highly consider the opinions of the leagues" when evaluating such contracts, believing that sports leagues have a professional advantage in identifying potential manipulation risks. The NFL has not yet released the full text of the letter, and it remains unclear whether Kalshi and Polymarket will adjust their related products.