During the recent World Cup, prediction market trading experienced a substantial surge, capturing 27% of all sports bets, far exceeding the growth seen at traditional sportsbooks. Kalshi, a major player in this market, repeatedly broke its own trading records throughout the tournament, reaching nearly 10 times its trading volume from earlier in the year. This growth highlights the increasing competitive challenge that companies like Kalshi pose to the established sports gambling industry.
Prediction market platforms, including Kalshi and Polymarket, together accounted for $50 billion in monthly volume as the 2026 World Cup commenced. Just prior to the tournament, Kalshi's peak trading volume had already doubled during the New York Knicks' playoff run, indicating a significant upward trend that accelerated dramatically with the World Cup. This marked a monumental breakout for prediction markets in the sports betting landscape.
Traditional sportsbooks, by contrast, projected to handle between $2.8 billion and $4.3 billion across the 104 matches of the tournament. The performance of prediction markets has surpassed all estimates from analysts, with Macquarie Group's Chad Beynon noting that the World Cup helped quadruple monthly trading volumes across platforms like Kalshi and Polymarket. This remarkable performance underscores a shift in how bettors are engaging with major sporting events.
