Kalshi posted a record month for trading volume in June, nearly $9.4 billion, as the 2026 FIFA World Cup fuelled activity across prediction markets, DefiLlama data shows. That was up from about $5.3 billion in May.
Polymarket International also climbed to roughly $4.3 billion from about $3.5 billion a month earlier. The tournament kicked off on June 11 and is the first FIFA World Cup to feature 48 teams, up from 32 in previous editions.
CNBC reported the competition became the biggest driver of prediction market trading in June, with Dune Analytics showing record notional trading volumes on Kalshi and Polymarket.
In late June, the company became an official partner of the FIFA World Cup 2026, marking one of the most significant mainstream partnerships for a regulated prediction market platform.
The partnership reinforced Kalshi’s position as one of the fastest-growing players in the sector while introducing regulated event contracts to a broader global audience.
JUST IN: Kalshi posted a record $9.4 billion in June trading volume, fueled by the 2026 FIFA World Cup, as prediction markets reached all-time highs. pic.twitter.com/EdO9j0gskk
— EyeWhales (@EyeWhales) July 4, 2026
Kalshi trading volume hits June record. Source: DefiLlama
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