Kalshi June trading volume tops $9B as World Cup fuels prediction markets

Kalshi posted a record month for trading volume as the expanded FIFA World Cup boosted prediction market activity, DefiLlama data shows.

Kalshi posted a record month for trading volume in June, nearly $9.4 billion, as the 2026 FIFA World Cup fueled 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.

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