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Prediction market turnover surges as volume estimates draw scrutiny

Blockonomi, collecting Macquarie and other industry data, reports total prediction market volume of 20.1 billion dollars in September 2026, up 1,079 percent year over year. The same collection cites Pew Research Center analysis putting combined Polymarket and Kalshi monthly volume at about 24 billion dollars in April 2026.

According to Blockonomi, total prediction market volume reached 20.1 billion dollars in September 2026, an increase of 1,079 percent from a year earlier. The outlet compiled figures from Macquarie and other industry data.

The reported annual increase points to a substantial expansion in trading activity. However, the limited material provided does not specify how the total was calculated or which platforms it includes.

Two figures, different reference points

The same Blockonomi collection cites Pew Research Center analysis that puts combined monthly volume on Polymarket and Kalshi at about 24 billion dollars in April 2026.

That April figure exceeds the reported September total, but the available summary does not establish whether the two estimates use comparable definitions or coverage. They therefore do not, on their own, demonstrate a decline between April 2026 and September 2026.

What it means for prediction markets

  • The reported 1,079 percent year-over-year increase indicates sharply higher aggregate activity, but does not establish how trading was distributed across individual markets.
  • The September total and the April Polymarket–Kalshi estimate should be treated as separate reference points until their methodologies can be compared.
  • Aggregate volume alone does not establish the liquidity or reliability of prices in any particular prediction contract.
KalshiPolymarketInfiniti MarketsInfiniti Signals

Sources & attribution

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    Blockonomi
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