Artemis data showed total prediction market trading volume reached $123.3 billion in October, the first time the sector has crossed the $100 billion mark. That was up about 53.9% from the previous record set in September, while total trade count climbed to 642.9 million. Kalshi handled $98.2 billion of volume, or roughly 80% of the monthly total, across 465.5 million trades. Polymarket posted $20.2 billion in volume and 148 million trades. Artemis said parlay products tied to football season were the main driver for Kalshi, making up 67.6% of its monthly volume, with most contracts priced below one cent. The data also noted that Kalshi counts volume based on the full $1 payout value of each contract, meaning the figure does not equal the actual capital committed by traders. In other segments, U.S. midterm election markets recorded more than $1.4 billion in volume, while crypto contracts on Kalshi and Polymarket topped $3 billion for two straight weeks for the first time. Polymarket’s U.S. platform generated nearly $10 billion in October volume, about 15% above its previous record.
According to Artemis data, total prediction market trading volume reached $123.3 billion in October, marking the first time the sector has moved above $100 billion. Trade count for the month came in at 642.9 million.
Kalshi and Polymarket volumes
Kalshi recorded $98.2 billion in October trading volume, accounting for about 80% of the total, with 465.5 million trades. Polymarket posted $20.2 billion in volume and 148 million trades.
Football-season parlays drove Kalshi activity
Artemis said parlay products tied to football season were the main driver, representing 67.6% of Kalshi’s monthly volume. Most of those contracts were priced below $0.01.
Artemis also noted that Kalshi measures volume using the full $1 payout value of each contract, so the reported figure is not the same as the actual amount of capital put in by traders.
Other market segments
Volume in U.S. midterm election markets exceeded $1.4 billion. At the same time, crypto contract volume on Kalshi and Polymarket topped $3 billion for two consecutive weeks for the first time.
Polymarket’s U.S. platform generated nearly $10 billion in October volume, about 15% above its previous record.
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