VolumeWhere every number comes from
The data, rate or quote types and calculation behind each figure on the Volume page. Data as of Sep 25, 2:30 PM ET; this page updates with it. For a frozen copy, use the snapshot.
Venues, 30 days
Volume by category
Most traded markets
Every figure and contract
Prediction market volume, 30 days
$16.3BThe dollar value of all contracts traded on Kalshi, Polymarket and Polymarket US, Aug 26-Sep 24, 2026.
Sum of daily traded volume across the three venues.
Measure: Traded volume. Cited as: “Prediction markets traded $16.3 billion in 30 days” (DeFi Rate volume data).
Data sources (1)
Kalshi volume vs. prior 30 days
+72%Kalshi’s 30-day volume ($13.8B) compared with the 30 days before ($8.0B).
We’re double-checking this figure with our data provider; it will be updated here if it changes.
Measure: Traded volume. Cited as: “Kalshi’s volume rose 72% month over month” (DeFi Rate volume data).
Data sources (1)
Prediction market volume, 24 hours
$595MDollars traded across the three venues in the 24 hours to Sep 25, 2026.
Sum across venues.
Measure: Traded volume. Cited as: “$595 million traded in 24 hours” (DeFi Rate volume data).