This page may contain affiliate links to legal sports betting partners. If you sign up or place a wager, FOX Sports may be compensated. Read more about Sports Betting on FOX Sports. Polymarket and Kalshi are the two largest prediction market platforms in the United States, and both let traders buy and sell contracts on the outcome of sports, politics, and other real world events instead of placing a traditional bet. Each platform is regulated as a designated contract market under the Commodity Futures Trading Commission, which sets them apart from offshore prediction sites and traditional spor...
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