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Kalshi and Polymarket Combined Trading Volume Drops to $45.33B in August, First Monthly Decline

OdailyOdaily

Odaily News: The combined monthly trading volume of Kalshi and Polymarket fell to $45.33 billion in August, down 14.5% month-over-month, marking the first monthly decline since August 2025. During the World Cup from June 11 to July 19, prediction market trading volume increased, but declined in August after the event ended. Kalshi's August trading volume was $37.17 billion, down 7.3% month-over-month; Polymarket and its U.S. platform combined for $8.16 billion, down 36.7% month-over-month. August trading volume was higher than May's $25.66 billion.

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