Combined trading on Kalshi and Polymarket jumped to $23.8 billion, John Gramlich notes

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Yaroslav Dmytrenko

27.05.2026

Combined trading on Kalshi and Polymarket jumped to $23.8 billion, John Gramlich notes — Kalshi and Polymarket trading surges

John Gramlich reports that combined global trading volume on prediction markets Kalshi and Polymarket has surged more than fivefold since September, increasing from $4.5 billion to $23.8 billion per month.

The sharp rise highlights significant growth in activity on these platforms over a relatively short period.

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John Gramlich has previously examined data comparisons in other sectors. In a recent article, he discussed the challenges in determining whether American wages keep pace with inflation, noting the dependence on definitions and timeframe. The debate highlights the complexities in measuring economic trends across markets.

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