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Kalshi leads prediction-market turnover as daily volume reaches $5.39 billion

Kalshi handled about 75 percent of volume over the last 30 days, ahead of Polymarket US at about 11 percent and Polymarket at about 4 percent. Volume Race compiles the figures from each exchange's own daily reports.

Prediction markets recorded $5.39 billion in trading across 10 exchanges on November 3, according to Volume Race. Volume over the last 30 days totaled $130.86 billion.

Kalshi accounts for most reported trading

Kalshi handled about 75 percent of volume over the last 30 days, according to Volume Race. That put it well ahead of the other two platforms identified in the summary.

Polymarket US accounted for about 11 percent of volume during that period, while Polymarket represented about 4 percent. The figures list Polymarket US and Polymarket separately.

Figures draw on exchange disclosures

Volume Race compiles its figures from each exchange’s own daily reports. The reporting published on Nov 5, 2026, at 6:30 AM ET provides both a November 3 snapshot and a last-30-days aggregate.

Those measures describe reported trading activity and its distribution across platforms. The supplied figures do not include contract-level volume or market prices.

What it means for prediction markets

  • Activity is concentrated: Kalshi’s roughly 75 percent share places most reported last-30-days turnover on one exchange.
  • Platform distinctions matter: Polymarket US and Polymarket have separately reported shares of about 11 percent and about 4 percent.
  • Volume is not an odds signal: These aggregate figures do not establish how the probability of any individual outcome changed.
  • The reporting basis matters: The totals come from exchange daily disclosures compiled by Volume Race.
KalshiPolymarketInfiniti MarketsInfiniti Signals

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