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Kalshi dominates trading as prediction market volumes climb in October

DeFi Rate's volume tracker puts 30-day volume at 124.0 billion dollars across nine venues, with Kalshi at 95.5 billion dollars and Polymarket US second at 14.5 billion dollars. October alone traded 118.2 billion dollars, up 59 percent from September on a like-for-like basis.

Prediction markets recorded 124.0 billion dollars in contract trading over the last 30 days across nine venues, according to DeFi Rate’s volume tracker. Kalshi accounted for 76 percent of that activity.

Trading concentrated at the top

Kalshi handled 95.5 billion dollars in volume during the 30-day period. Polymarket US ranked second with 14.5 billion dollars, according to DeFi Rate.

The figures place Kalshi well ahead of its nearest reported competitor. They also show that the aggregate volume across the nine venues was heavily concentrated in one platform.

October activity accelerates

October alone generated 118.2 billion dollars in trading, according to DeFi Rate. That represented a 59 percent increase from September on a like-for-like basis.

The October total and the rolling 30-day figure cover distinct reporting windows. The month-to-month comparison provides the reported measure of growth, while the 30-day breakdown shows how trading was distributed among venues.

What it means for prediction markets

  • Venue concentration matters: Kalshi’s 76 percent share makes its activity central to interpreting the reported market-wide total.
  • Growth was substantial: October’s 59 percent like-for-like increase points to a sharp rise in trading activity from September.
  • Volume has limits: These figures describe contract turnover, not the accuracy of market forecasts or the number of participants.
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.

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