The terms, rate or quote types and calculation behind each figure on the News page. Verified Sep 22, 12:00 PM ET; this page updates with it. For a frozen copy, use the snapshot.
Figures5 records below, each with its own link (#id)
Kalshi’s 30-day trading volume
$13.6B
The dollar value of all contracts traded on Kalshi in the 30 days to Sep 21, 2026.
Summed from DeFi Rate’s volume data for Aug 23 to Sep 21, 2026 (30 days). Volume is the dollar value of contracts traded, counted once per trade.
Measure: 30-day traded volume. Cited as: “Kalshi handled about $13.6 billion in trading over the past 30 days” (DeFi Rate volume data).
Data sources (1)
DeFi Rate market data
Prediction-market volume by venue and categoryEndpoint /v1/alltopdr/volume/summaryDeFi Rate’s licensed data feed; not a public page.
Kalshi’s volume vs. the prior 30 days
+98%
Kalshi’s 30-day volume compared with the 30 days before it. We’re double-checking this figure with our data provider; it will be updated here if it changes.
Summed from DeFi Rate’s volume data for Aug 23 to Sep 21, 2026 (30 days). Volume is the dollar value of contracts traded, counted once per trade.
Measure: 30-day traded volume. Cited as: “Kalshi’s volume nearly doubled from the prior 30 days” (DeFi Rate volume data).
Data sources (1)
DeFi Rate market data
Prediction-market volume by venue and categoryEndpoint /v1/alltopdr/volume/summaryDeFi Rate’s licensed data feed; not a public page.
Kalshi’s share of prediction-market volume
85%
Kalshi’s share of 30-day volume across the venues we track (Kalshi and Polymarket).
Summed from DeFi Rate’s volume data for Aug 23 to Sep 21, 2026 (30 days). Volume is the dollar value of contracts traded, counted once per trade.
Measure: 30-day traded volume. Cited as: “Kalshi accounts for about 85% of prediction-market volume” (DeFi Rate volume data).
Data sources (1)
DeFi Rate market data
Prediction-market volume by venue and categoryEndpoint /v1/alltopdr/volume/summaryDeFi Rate’s licensed data feed; not a public page.
Sports share of Kalshi volume
46%
The share of Kalshi’s 30-day volume in sports contracts, which the margin proposal would exclude.
Summed from DeFi Rate’s volume data for Aug 23 to Sep 21, 2026 (30 days). Volume is the dollar value of contracts traded, counted once per trade.
Measure: 30-day traded volume. Cited as: “Sports make up about 46% of Kalshi’s volume” (DeFi Rate volume data).
Data sources (1)
DeFi Rate market data
Prediction-market volume by venue and categoryEndpoint /v1/alltopdr/volume/summaryDeFi Rate’s licensed data feed; not a public page.
The Kalshi Klear margin filing
Filed
Kalshi Klear’s proposed rule changes for risk-based margin on eligible event contracts, filed with the CFTC. The risk-model inputs are redacted in the public version.
Reporting is based on the filing as first reported by CNBC on Sep 22, 2026. The rule changes can’t take effect before the first business day after the CFTC’s 45-day review.
Record type: Regulatory filing. Cited as: “Kalshi Klear has asked the CFTC to allow risk-based margin on some event contracts” (Kalshi Klear CFTC filing).