
According to the court, the ban may take effect Friday; Kalshi’s sports markets launched in January 2025 and now account for 70% of revenue, marking the first U.S. prohibition of its offerings.
Massachusetts Judge Christopher Barry-Smith ruled that the state can prohibit prediction market Kalshi from offering sports betting unless it secures a Massachusetts Gaming Commission license, with a preliminary injunction potentially effective Friday. The decision rejects Kalshi’s claim of exclusive federal oversight by the CFTC. The court cited violations despite CFTC warnings. Kalshi’s sports markets launched in January 2025 and now generate 70% of the company’s revenue, and this action is described as the first such U.S. ban.