Sports market turnover reaches $595 million as Kalshi accounts for majority

Sports prediction markets recorded $595 million in trading volume over 24 hours, a 42 percent increase, according to DeFi Rate. The figures were published on Nov 7, 2026, at 5:45 PM ET.

Kalshi leads the reported volume

DeFi Rate’s total covers Kalshi, Polymarket US, Polymarket, Novig, Rothera, DraftKings Predictions and Underdog Exchange. The supplied summary does not specify the comparison period for the 42 percent increase.

Kalshi accounted for $355 million of the reported turnover, placing it at more than half of the aggregate. The summary does not provide individual volume figures for the other platforms.

Open interest has a narrower scope

Open interest stood at $641 million across Kalshi and Polymarket US, according to DeFi Rate. That figure covers only those two platforms, rather than the seven included in the trading-volume total.

The distinction matters when assessing activity: the $595 million figure measures trading over 24 hours, while open interest measures outstanding positions. The two figures therefore should not be treated as interchangeable measures of market size.

What it means for prediction markets

• Activity increased, but the benchmark is unspecified. DeFi Rate reported a 42 percent rise; the supplied summary does not identify the comparison period.
• Kalshi supplied most of the turnover. Its $355 million contribution represents a majority of the seven-platform total, though the remaining platforms’ individual shares are not given.
• Coverage differs between metrics. The $641 million open-interest figure applies to Kalshi and Polymarket US only, limiting comparisons with the broader volume aggregate.