New Delhi, July 18 -- The FIFA World Cup has fueled unprecedented activity on prediction market platforms, with Kalshi and Polymarket recording their highest-ever trading volumes as fans wager on the tournament's outcome. According to Fortune, the contract tied to Sunday's Argentina-Spain final has become the largest single market in the history of both platforms, highlighting the growing popularity of event-based trading.

Data provided by Kalshi showed that its Argentina-Spain final contract, launched on Wednesday after Argentina defeated England in the semifinal, had already generated more than $1.27 billion in trading volume. By Friday afternoon, the platform's market gave Spain a 61% probability of defeating Lionel Messi's Argentina ...