$1.63B traded on Oct. 31 so far across 9 prediction market venues, with Kalshi at $1.46B

Prediction-market trading totaled $1.63B across 9 venues on Oct. 31 so far, with Kalshi accounting for $1.46B, according to the supplied market snapshot published Oct. 31, 2026, at 7:54 AM ET.

Kalshi therefore represented most of the reported activity. The snapshot is an intraday reading, not a completed daily total.

Volume measures require care

Defirate.com’s volume page separately reports $4.5B over the last 24 hours. It also distinguishes contracts valued at their $1 face value from dollars actually paid, reporting $29.5B for the latter measure. The supplied excerpt does not specify the period covered by that $29.5B figure or establish how these measures align with the headline snapshot.

The accompanying news summary identified no significant new platform headline in the preceding 30 minutes. Search results instead resurfaced material from Oct. 30–31 that had already been used or held back, leaving the volume figures as the principal update.

What it means for prediction markets

• Activity was concentrated at Kalshi: Its $1.46B accounted for most of the $1.63B reported across 9 venues.
• The reporting windows differ: Oct. 31 activity so far and a last-24-hours total should not be treated as equivalent.
• Valuation matters: Contract face value and dollars actually paid are distinct measures; the supplied material does not support directly reconciling all the totals.
• Volume is not a directional signal: These aggregate figures do not establish changes in any individual contract’s implied probability.