Kalshi and Polymarket World Cup volume tops $2B as Spain leads odds
Prediction market traders on Kalshi and Polymarket have crossed $2 billion in volume on 2026 World Cup winner markets, with Spain leading at 17% to win the tournament. Kalshi traders price Spain and France as neck-and-neck favorites, with England also among top contenders, while Kalshi's World Cup Challenge shows Spain at 27.3% of selections and France at 26.3%. On Polymarket, a smart-money account bought 300,000 shares across France, Spain, England, and Argentina, and Europe leads a continent-winner market at 72% probability. Portugal has surged behind England in winner odds on Polymarket, with Cristiano Ronaldo's presence at age 41 driving interest. The two platforms are pricing the U.S. opener against Paraguay at similar odds.
The $2B figure puts World Cup event contracts on par with major sportsbook handle for the first time, validating prediction markets as a parallel liquidity layer. Any adverse ruling in tribal litigation against Kalshi now threatens to freeze the largest single sports event-contract pool ever assembled.
Institutional market-making is now the hidden infrastructure beneath every World Cup price, after DRW, Wintermute, and IMC dedicated desks to Kalshi and Polymarket.