Kalshi leads 30-day volume at about $14.8B, with Polymarket second at about $5.2B

Kalshi ranks first in the supplied 30-day prediction-market volume snapshot at about $14.8B, followed by Polymarket at about $5.2B. The figures put trading activity, rather than a new platform announcement, at the center of the latest update.

Volume leads a quiet update

The update, published Oct 16, 2026 · 2:09 AM ET, reports no significant new platform headline in the preceding 15 minutes. That makes the volume ranking the lead item for an otherwise quiet quarter-hour.

The cited outlet, nerdbot.com, published an explainer on Kalshi, Polymarket and newer prediction-market apps dated Oct 15, 2026. Its page text was unavailable, so the ranking here rests on the supplied headline rather than an independently reviewed account of the outlet’s methodology.

The available material does not explain how the 30-day totals were calculated or whether both platforms’ activity was measured on the same basis. It also provides no earlier comparison period to establish whether either platform’s volume is rising or falling.

What it means for prediction markets

• Kalshi leads this snapshot: Its reported 30-day volume is about $14.8B, with Polymarket second at about $5.2B.
• The ranking is not a trend: Without a prior-period comparison, these totals alone do not establish growth or a shift in platform leadership.
• Methodology remains a limitation: The unavailable source text leaves the comparability of the two reported totals unconfirmed.