Kalshi and Polymarket hit combined $45bn volume in June on World Cup fever

The combined trading volume of Kalshi and Polymarket surged 75% in June to $45 billion, driven by FIFA World Cup 2026 fever. Kalshi saw the largest month-over-month increase among the three platforms tracked, jumping 87.4% from $16.81 billion to $31.5 billion. The figures highlight the rapid growth of decentralised prediction markets during major sporting events.

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