$1.36B traded on Oct. 31 so far across 9 prediction market venues, with Kalshi at $1.23B

Kalshi leads the Oct. 31 snapshot

Prediction-market trading totaled $1.36B across 9 venues on Oct. 31, 2026, as of the supplied update published at 4:54 AM ET. Kalshi accounted for $1.23B of that activity.

The accompanying news-search summary identified no significant new platform headline in the preceding 30 minutes. Results instead resurfaced material already used or held back that day, including an item concerning Kalshi and a 76ers partnership.

Volume measures need context

According to defirate.com, its volume presentation values contracts at their $1 face value. The supplied source excerpt separately lists $29.4B in dollars actually paid and $4.4B over the last 24 hours.

The excerpt does not specify the period covered by the $29.4B figure or provide enough detail to reconcile its rolling 24-hour total with the Oct. 31 snapshot. Those figures should therefore remain distinct rather than be treated as interchangeable measures of trading activity.

What it means for prediction markets

• Kalshi represents the bulk of the reported $1.36B across 9 venues, making the snapshot primarily a measure of activity on that platform.
• Face-value volume and dollars actually paid are different measures; comparisons require consistent definitions and time windows.
• The supplied news search offers no fresh platform development to explain the trading total. It also provides no contract-level prices or volumes from which to assess changes in implied probabilities.