Sports Betting Drives Kalshi and Polymarket to Record-Breaking Trading Volumes
October proved to be a landmark month for the prediction market industry, as two major platforms, Kalshi and Polymarket, collectively achieved unprecedented trading volumes. Together, these venues processed $7.4 billion in volume during the month, surpassing any prior performance, including their previous peak in November 2024 when election-driven markets tallied $4 billion. While election-related markets, especially those linked to the New York City mayoral race, continue to generate significant activity—reaching hundreds of millions in volume—sports betting has emerged as a powerful growth catalyst. Kalshi, in particular, posted an outstanding $4.4 billion in trading volume throughout October, while Polymarket recorded $3












