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kalshi historical data / elections / ECMOV
§elections

Electoral college margin of victory, tick by tick.
Kalshi series ECMOV: order book and trades, 2026-09-27 → 2026-10-23.

The order-book and trade history of Kalshi's Electoral college margin of victory series (new markets on an irregular schedule, one event per game, match or release): top of book on every change, the 25-level book on every change in YES terms, every trade with the taker's side, and Kalshi's own ticker, with exchange timestamps to the millisecond. Captured by us from Kalshi's websocket on two independent legs and checked against the exchange's own book snapshots.

27 days2026-09-27 → 2026-10-23 · every day since its first · ~572 kB per day · 15 MB on disk · 14 open markets
pull ECMOV days →schemapricing

What a ECMOV day contains

Four parquet files per day, every market of the series in each. Sizes are this series' own averages over its 27 days on disk.

Top of book (every change)kalshi_l1

Best YES bid and ask with sizes and the spread, one row whenever either changed, derived tick by tick from the rebuilt book: not Kalshi's conflated ticker.

~64 kB per ECMOV day
Order book, 25 levels, every changekalshi_l2

The whole ladder after every book event, in YES terms (the NO bids become the asks, at their sizes), 25 levels a side: wide columns bid_px_1 … ask_sz_25, plus the exchange's own hourly snapshots. Each row is self-contained, so you can start reading mid-day.

~442 kB per ECMOV day
Tradeskalshi_trades

Every trade: YES and NO price, size in contracts, the taker's side, block-trade flag, trade id.

~4 kB per ECMOV day
Kalshi ticker (~1 s)kalshi_ticker

Kalshi's own ticker feed, about one update a second per market: last price, YES bid/ask with sizes, cumulative volume and open interest in contracts and dollars.

~62 kB per ECMOV day

ECMOV markets

The 12 closing nearest to now, from Kalshi's daily market list. Each is a row key (market_ticker) in every table, captured from the day it opens until it settles.

Will the Democratic candidate win the 2028 presidential election by 11 to 30 Electoral College votes?: Democratic by 11 to 30ECMOV-28NOV07-DEM11T30closes 2029-05-06 15:00 UTC
Will the Democratic candidate win the 2028 presidential election by 131 to 210 Electoral College votes?: Democratic by 131 to 210ECMOV-28NOV07-DEM131T210closes 2029-05-06 15:00 UTC
Will the Democratic candidate win the 2028 presidential election by 1 to 10 Electoral College votes?: Democratic by 1 to 10ECMOV-28NOV07-DEM1T10closes 2029-05-06 15:00 UTC
Will the Democratic candidate win the 2028 presidential election by 211 to 538 Electoral College votes?: Democratic by 211 or moreECMOV-28NOV07-DEM211T538closes 2029-05-06 15:00 UTC
Will the Democratic candidate win the 2028 presidential election by 31 to 60 Electoral College votes?: Democratic by 31 to 60ECMOV-28NOV07-DEM31T60closes 2029-05-06 15:00 UTC
Will the Democratic candidate win the 2028 presidential election by 61 to 90 Electoral College votes?: Democratic by 61 to 90ECMOV-28NOV07-DEM61T90closes 2029-05-06 15:00 UTC
Will the Democratic candidate win the 2028 presidential election by 91 to 130 Electoral College votes?: Democratic by 91 to 130ECMOV-28NOV07-DEM91T130closes 2029-05-06 15:00 UTC
Will the Republican candidate win the 2028 presidential election by 11 to 30 Electoral College votes?: Republican by 11 to 30ECMOV-28NOV07-REP11T30closes 2029-05-06 15:00 UTC
Will the Republican candidate win the 2028 presidential election by 131 to 210 Electoral College votes?: Republican by 131 to 210ECMOV-28NOV07-REP131T210closes 2029-05-06 15:00 UTC
Will the Republican candidate win the 2028 presidential election by 1 to 10 Electoral College votes?: Republican by 1 to 10ECMOV-28NOV07-REP1T10closes 2029-05-06 15:00 UTC
Will the Republican candidate win the 2028 presidential election by 211 to 538 Electoral College votes?: Republican by 211 or moreECMOV-28NOV07-REP211T538closes 2029-05-06 15:00 UTC
Will the Republican candidate win the 2028 presidential election by 31 to 60 Electoral College votes?: Republican by 31 to 60ECMOV-28NOV07-REP31T60closes 2029-05-06 15:00 UTC

Coverage notes for ECMOV

  • First day on disk: 2026-09-27. That is the day our Kalshi capture began, not the series' launch. New days are added daily.
  • Trades before 2026-09-27. Kalshi's historical API has no tick-level order book, so earlier ECMOV trades are in the whole-exchange trades history (from 2021-06-30, one file a day): filter market_ticker to this series' markets, which start with ECMOV-.
  • The first day starts at 11:00 UTC. Our capture began at 11:00 UTC on 27 September 2026: 13 hours that day, not 24, and no CF Benchmarks index file (that capture starts on the 28th).
  • A book-quality dip on 2026-09-29. During a pipeline cutover 10,255 exchange snapshots disagreed with the rebuilt book (41 to 1,378 on every other day) and 16,678 negative levels were clamped to zero. The book resynchronises at every exchange snapshot; trades and ticker are unaffected.
  • Every bundle ships a README with the schemas and, per day, how often the rebuilt book matched the exchange's own snapshots, for your exact range.

Pricing

A month of ECMOV, every table, is about 17 MB. Bought for Kalshi, Starter ($29/mo) carries top of book, trades and the ticker for every series plus one series of your choice, ECMOV if you like, at full book depth; L10 ($49/mo) carries every series' book at 10 levels and L25 ($99/mo) the full 25-level book. Each includes 7 days before you join and every day after. Any free account can pull 2026-10-07, any series, up to 1.0 GB.

Starter: ECMOV at full depth →L10: every series at 10 levelsL25: every series, 25 levelsfree sample day

Other elections series on Kalshi

House Race Winner?Midterm margin of victoryVote percentages in US general electionsMichigan Senate-Governor ComboMidterm Voter TurnoutHow many seats will party win in state?2028 D runningWorld leaders out this year?Who will win the Vancouver mayoral election?State legislature winnersWhich state ballot measures will pass?Democratic Primary winner2028 R runningDemocratic VP nomCounty vote percentagesDemocratic House seatsGeneral election county winnersclosest governor's raceMinnesota GovernorRepublican house seats… the whole venue