Kalshi and Polymarket’s combined volume falls 15% in August, first monthly decline in a year

▤ Summary

Kalshi and Polymarket saw their combined monthly trading volume fall 14.5% in August after a World Cup-driven spike. Kalshi posted $37.17 billion in volume, while Polymarket and its U.S. platform generated $8.16 billion. The article also notes rising legal and regulatory pressure from U.S. states over sports-related contracts. Despite that scrutiny, Kalshi continues to expand its sports presence through a partnership with the U.S. Tennis Association for the U.S. Open.

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