Pew Research reported that this increase in volume was primarily due to a large uptick in sports trading, which has become the dominant topic on both platforms. The growth indicates a rapid shift in the type of events users are wagering on globally.
Tuesday, October 20, 2026
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Kalshi and Polymarket Combined Trading Volume More Than Doubles in 2 Months
Sports25 days ago
Sports betting is now the most frequent activity on prediction platforms Kalshi and Polymarket. A surge in athletic wagers drove the combined monthly global trading volume of the two sites to more than double in the span of two months, specifically from May to June.
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