The U.S. Senate unanimously passed a rule Thursday barring senators from trading on prediction markets effective immediately. The bipartisan resolution prevents senators who are often privy to sensitive information from making bets on upcoming events and will go into effect immediately. The move came amid concern about insider trading on prediction market platforms such as Kalshi and Polymarket, following an indictment of a U.S. Army soldier for using classified information about the Venezuelan military raid to bet on Polymarket.