DeFi Rate tracks daily Kalshi trading volume, market share, and event data across Kalshi’s prediction markets. Charts updated weekly and monthly, can be shared directly, and are available for export with attribution.
Monthly Trading Volume & Cumulative Total
Kalshi monthly trading volume in USD with a running cumulative total for year-to-date.
$31.04B
YTD Total
▲ 45.3%
$12.29B
Current Month Volume
▲ 26.7%
Monthly Volume
Cumulative
| Month ISO | Monthly Volume | MoM Change % | Cumulative | YTD YoY % |
|---|---|---|---|---|
| 2025-12 | $5.84B | — | $5.84B | — |
| 2026-01 | $9.05B | ▲ 55.1% | $9.05B | ▲ 55.1% |
| 2026-02 | $9.70B | ▲ 7.1% | $18.75B | ▲ 54.0% |
| 2026-03 | $12.29B | ▲ 26.7% | $31.04B | ▲ 45.3% |
Weekly Volume Chart
Kalshi weekly trading volume in USD. This chart is updated daily with rolling data, with final snapshot on Monday.
Volume by Market Category — Monthly Growth
Kalshi's monthly trading volume split by category. Sports accounts for more than 80% of total volume. The 'Other' category includes Exotics, which are Kalshi's combination markets.
Market Share: Kalshi and Polymarket International
Chart provides market share percentage for Kalshi vs. Polymarket on WoW basis. Hover tool tip available.
56.0%
Current Month (Kalshi)
44.0%
Current Month (Polymarket)
Kalshi
Polymarket
Methodology
Data Source
Trading volume data is sourced from Kalshi’s public market activity. Market share figures are derived by comparing Kalshi and Polymarket reported volumes over the same period. Raw data is reviewed and cleaned prior to publication. 2025 figures sourced from Dune for YoY comparison.
Volume figures
Dollar volume represents the total notional value of contracts traded (number of contracts × price paid), not open interest or fees. All figures are in USD.
Category breakdown
Events are assigned to a single category at the time of listing. Recategorizations are not retroactively applied to historical months.
Update frequency
All charts are updated daily. Weekly figures are finalized each Sunday and locked; intra-week bars reflect volume to date.
Event volume
Represents lifetime volume for each market from open to close, regardless of when the event occurred.
Rounding
All dollar figures are rounded to the nearest $10M for display. Underlying CSV data is unrounded.