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Kalshi accounts for most October 31 prediction-market volume

DeFi Rate reports October 31 volume totaled 5.68 billion dollars across nine venues, with Kalshi at 4.79 billion dollars, Polymarket US at 532 million dollars and Polymarket at 235 million dollars. Volume on November 1 so far is 359 million dollars.

Prediction-market trading volume reached 5.68 billion dollars across nine venues on October 31, according to DeFi Rate. Kalshi accounted for 4.79 billion dollars of that total.

Trading concentrated at Kalshi

The other named venues recorded substantially smaller totals. DeFi Rate put Polymarket US volume at 532 million dollars and Polymarket volume at 235 million dollars.

The figures place Kalshi well ahead of both in reported trading activity for October 31. The supplied summary does not identify the remaining six venues or provide their individual volumes.

November opens with a partial tally

DeFi Rate also reported 359 million dollars in volume for November 1 so far. That is an incomplete-day figure, rather than a directly comparable full-day total.

The supplied publication timestamp is Oct 31, 2026 · 11:15 PM ET. The summary does not explain the reporting cutoff or time-zone basis for the November 1 tally.

What it means for prediction markets

  • The October 31 figures show trading volume concentrated at Kalshi, with Polymarket US and Polymarket recording smaller totals.
  • Aggregate venue volume does not establish liquidity or pricing quality in any individual prediction contract.
  • The partial November 1 tally is insufficient to determine whether full-day activity will rise or fall against October 31.
KalshiPolymarketInfiniti MarketsInfiniti Signals

Sources & attribution

Published
  1. Source
    DeFi Ratedefirate.com
    Publisher
    https://defirate.com
    Source URL
    The feed did not publish this story's article address.

Full attribution under the Digital Millennium Copyright Act (DMCA), 17 U.S.C. § 512: this article is an original report by Infiniti Intelligence that summarizes the reporting of the publishers named above, links to their original work, and reproduces no protected expression beyond brief factual reference and in-line attribution (“according to DeFi Rate”). All rights in the underlying reporting remain with the publishers listed; nothing here implies endorsement by or affiliation with them. Rights holders may request correction, update or removal through the contact address published at infiniti.w3ai.io.

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