July 23 : Prediction market startup Kalshi scored well during the 2026 FIFA World Cup, netting roughly double its projected user traffic and trading volume as fans scrambled to turn their soccer savvy into profits.Kalshi recorded $27 billion in trading volume and saw about 3 million users during the length of

Sports accounted for 80% of both Kalshi and Polymarket's total volumes throughout the weekslong World Cup tournament.

Data analysis of market share between Kalshi, Polymarket, Robinhood and all the other federally regulated prediction market exchanges.