Svmuu News: In the ten days leading up to the World Cup, trading volume in Polymarket’s soccer category exceeded $2 billion, a 300% increase compared to the previous ten days, with average daily trading volume rising from $53 million before the tournament to approximately $220 million. Meanwhile, Kalshi’s open interest reached a record $1.16 billion last Thursday, surpassing the $1 billion mark for the first time and marking a 350% increase year-to-date.
Although Polymarket’s open interest remained relatively stable during the World Cup, and open interest at Polymarket’s U.S. division saw only modest growth—falling short of the April 2026 peak— Kalshi’s open interest is growing faster than its trading volume, indicating that its user base is holding positions for longer periods and taking larger directional positions. Its CFTC-regulated on-ramps and direct U.S. dollar deposit channels have attracted U.S. institutional and high-net-worth U.S. dollar investors. (The Block)