Prediction market volume and venue market share
Polymarket traded $53.8M in the last 24 hours across 203,124 open markets, a complete figure summed from its catalog. Kalshi’s figure is summed hourly across every open Kalshi market, since Kalshi publishes no exchange-level total. Polymarket US publishes no 24-hour volume at all, so its row shows its total volume only and stays out of the share.
24-hour volume by venue
| Venue | Coverage | Markets | 24h volume | Total volume |
|---|---|---|---|---|
| Polymarket | complete | 203,124 | $53.8M | $5.1B |
| Polymarket US | partial lifetime notional of the markets this service stores; Polymarket US publishes no 24h volume | 25,684 | not published | $315.3M |
| Kalshi | complete open markets | 151,760 | $75.7M | $2.2B |
| Robinhood | none venue publishes no machine-readable market data | – | – | – |
| DraftKings | none venue publishes no machine-readable market data | – | – | – |
| FanDuel | none venue publishes no machine-readable market data | – | – | – |
Rolling 24-hour figures, each as the venue reports it. Both venues count every contract traded at its $1 face value, so their figures compare directly.
24-hour market share
Between the venues measured completely; venues that publish no market data are not in the total.
By category
| Category | Events summed | 24h volume, top 24 |
|---|---|---|
| Sports | 24 | $18.6M |
| Politics | 24 | $10.8M |
| Crypto | 24 | $3.3M |
| Economy | 24 | $2.4M |
| World | 24 | $1.5M |
| Culture | 24 | $1.1M |
| Climate & Weather | 24 | $740K |
| Tech & Science | 24 | $309K |
| Health | 24 | $24K |
Polymarket only; each row sums the 24 highest-volume live events in that category, so it describes the head of each category rather than all of it. Each event counts in one category only.
Methodology and what is counted
- Complete: every active market on the venue is summed: Polymarket from its full catalog, Kalshi from an hourly pass over all of its open markets. Volume on markets that settled within the window is not included, so Kalshi's figure is slightly low.
- Partial: the pass could not read the whole venue this time; the figure is a lower bound. Polymarket US is always partial: it publishes no 24-hour volume, so its row carries its total volume only.
- None: the venue publishes no machine-readable market data at all.
- Share is computed only across venues with complete coverage, and only when there are at least two of them; Polymarket US is never in it.