Tick-by-tick trades and L2 order-book depth for 35 Midterms, House & Senate series on Kalshi & Polymarket — midterm margin of victory, midterm voter turnout, House race winners, state ballot measures, political fundraising. 5,328 series-days covering November 2025 – September 2026; 17.2K trades · $772.6K turnover in the 30 days to 2026-09-02. Sold as day bundles from €1.
Midterm margins and turnout, House race winners, ballot measures, fundraising.
Every series below is archived at full feed resolution — each contract file carries every trade print (price, size, side) and Level-2 order-book updates in one normalized, zstd-compressed schema. A series-day bundle holds all contracts of the series for one UTC day.
Ranked by USD turnover from our own daily statistics — the series a market maker or bot builder should start with.
| # | Series | Venue | Trades (30d) | Turnover (30d) | Days | |
|---|---|---|---|---|---|---|
| 1 | House Race Winner? | Kalshi | 6,232 | $283.7K | 28 | Buy days |
| 2 | Midterm margin of victory | Kalshi | 8,222 | $236.9K | 28 | Buy days |
| 3 | Which state ballot measures will pass? | Kalshi | 2,132 | $231.0K | 21 | Buy days |
| 4 | Midterm Voter Turnout | Kalshi | 527 | $19.4K | 28 | Buy days |
| 5 | NYC statistics | Kalshi | 29 | $864.75 | 25 | Buy days |
| 6 | Political fundraising | Kalshi | 49 | $660.48 | 28 | Buy days |
Trades and USD turnover summed over every contract of the series, from the recorded tick data; 30 days to 2026-09-02. Series without statistics in the window are omitted.
| Venue | Series | With stats | Trades (30d) | Turnover (30d) |
|---|---|---|---|---|
| Kalshi | 31 | 6 | 17,191 | $772.6K |
| Polymarket | 4 | 0 | — | — |
30 days to 2026-09-02, from our own daily statistics per contract.
Largest archive first. Each series page lists its exact coverage, day count and recent days; day bundles are bought in the shop calendar.
| Series | Venue | Interval | Days | Coverage | Size | Price/day | |
|---|---|---|---|---|---|---|---|
| Midterm margin of victory | Kalshi | event | 128 | April 2026 – September 2026 | 3.17 GB | €1 | Buy days |
| House Race Winner? | Kalshi | event | 183 | March 2026 – September 2026 | 2.85 GB | €1 | Buy days |
| Midterm Voter Turnout | Kalshi | event | 120 | May 2026 – September 2026 | 1.53 GB | €1 | Buy days |
| Democratic House seats | Kalshi | event | 183 | March 2026 – September 2026 | 443 MB | €1 | Buy days |
| Florida Governor Republican nominee | Kalshi | event | 169 | March 2026 – August 2026 | 261 MB | €1 | Buy days |
| Redistricting | Kalshi | event | 183 | March 2026 – September 2026 | 252 MB | €1 | Buy days |
| Republican house seats | Kalshi | event | 183 | March 2026 – September 2026 | 199 MB | €1 | Buy days |
| California Governor's race | Kalshi | event | 183 | March 2026 – September 2026 | 173 MB | €1 | Buy days |
| Gov WI Nom D | Kalshi | event | 162 | March 2026 – August 2026 | 158 MB | €1 | Buy days |
| Michigan Governor Republican nominee | Kalshi | event | 155 | March 2026 – August 2026 | 128 MB | €1 | Buy days |
| AK primary | Kalshi | event | 182 | March 2026 – September 2026 | 116 MB | €1 | Buy days |
| Democratic Senate seats | Kalshi | event | 183 | March 2026 – September 2026 | 89.3 MB | €1 | Buy days |
| Alaska governor | Kalshi | event | 183 | March 2026 – September 2026 | 88.8 MB | €1 | Buy days |
| National House popular vote margin? | Kalshi | event | 183 | March 2026 – September 2026 | 81.2 MB | €1 | Buy days |
| State legislature winners | Kalshi | event | 141 | April 2026 – September 2026 | 65.5 MB | €1 | Buy days |
| Which state ballot measures will pass? | Kalshi | event | 23 | August 2026 – September 2026 | 59.7 MB | €1 | Buy days |
| How many seats will party win in state? | Kalshi | event | 129 | April 2026 – September 2026 | 59.0 MB | €1 | Buy days |
| Political fundraising | Kalshi | event | 44 | July 2026 – September 2026 | 58.7 MB | €1 | Buy days |
| closest senate race | Kalshi | event | 183 | March 2026 – September 2026 | 46.3 MB | €1 | Buy days |
| Minnesota Democratic Senate nominee | Kalshi | event | 162 | March 2026 – August 2026 | 41.2 MB | €1 | Buy days |
| KSD | Kalshi | event | 155 | March 2026 – August 2026 | 35.9 MB | €1 | Buy days |
| Minnesota Democratic nominee for Governor | Kalshi | event | 162 | March 2026 – August 2026 | 35.2 MB | €1 | Buy days |
| Maine Governor Democratic nominee | Kalshi | event | 108 | March 2026 – June 2026 | 29.2 MB | €1 | Buy days |
| Republican senate seats | Kalshi | event | 106 | May 2026 – September 2026 | 29.2 MB | €1 | Buy days |
| closest governor's race | Kalshi | event | 183 | March 2026 – September 2026 | 23.1 MB | €1 | Buy days |
| NYC statistics | Kalshi | event | 27 | August 2026 – September 2026 | 16.5 MB | €1 | Buy days |
| Who will win the Chicago Mayoral Election? | Kalshi | event | 183 | March 2026 – September 2026 | 16.3 MB | €1 | Buy days |
| Who will win the next Senate Democratic Leader election? | Kalshi | event | 183 | March 2026 – September 2026 | 15.7 MB | €1 | Buy days |
| Which Georgia elections will be won outright? | Kalshi | event | 183 | March 2026 – September 2026 | 13.9 MB | €1 | Buy days |
| Voter turnout in the national House popular vote? | Kalshi | event | 183 | March 2026 – September 2026 | 13.1 MB | €1 | Buy days |
| Florida Republican Senate nominee | Kalshi | event | 169 | March 2026 – August 2026 | 12.3 MB | €1 | Buy days |
Largest archive first. Each series page lists its exact coverage, day count and recent days; day bundles are bought in the shop calendar.
| Series | Venue | Interval | Days | Coverage | Size | Price/day | |
|---|---|---|---|---|---|---|---|
| 2026 House Election Winners — Republican party (per district) | Polymarket | annual | 282 | November 2025 – September 2026 | 39.6 GB | €1 | Buy days |
| 2026 House Election Winners — Democratic party (per district) | Polymarket | annual | 282 | November 2025 – September 2026 | 38.9 GB | €1 | Buy days |
| 2026 House Election Margins of Victory — Republican candidates | Polymarket | annual | 30 | August 2026 – September 2026 | 9.35 GB | €1 | Buy days |
| 2026 House Election Margins of Victory — Democratic candidates | Polymarket | annual | 30 | August 2026 – September 2026 | 8.64 GB | €1 | Buy days |
Yes — House Race Winner (KXHOUSERACE) markets per district, midterm margin-of-victory and voter-turnout series, state ballot measures, political fundraising and NYC statistics.
One purchase covers every contract of a series for one UTC day — tick-by-tick trades plus Level-2 order-book updates per contract — typically €1 per series-day.
Coverage runs November 2025 – September 2026 — 5,328 series-days across 35 series on Kalshi & Polymarket. Each series page lists its exact span.
Yes — trades export as gzipped CSV or Parquet at no extra cost, with integer microsecond UTC timestamps that load straight into pandas, polars or DuckDB. Both venues record full order-book depth without a separate BBO stream, so book data ships in the native tick file — the free reader script converts it locally. See the formats overview.
Typically €1 per series-day bundle — every contract of the series for that UTC day, with invoice on checkout. Pick days in the shop calendar.