▌tickfoundry
capture livesign inget the data →
kalshi historical data / elections / KXUNDERHARRIS
§elections

Democrats underperforming Harris 2024, tick by tick.
Kalshi series KXUNDERHARRIS: order book and trades, 2026-09-28 → 2026-10-23.

The order-book and trade history of Kalshi's Democrats underperforming Harris 2024 series (a one-off event): 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.

26 days2026-09-28 → 2026-10-23 · every day since its first · ~720 kB per day · 18 MB on disk · 9 open markets
pull KXUNDERHARRIS days →schemapricing

What a KXUNDERHARRIS day contains

Four parquet files per day, every market of the series in each. Sizes are this series' own averages over its 26 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.

~66 kB per KXUNDERHARRIS 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.

~570 kB per KXUNDERHARRIS day
Tradeskalshi_trades

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

~13 kB per KXUNDERHARRIS 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.

~70 kB per KXUNDERHARRIS day

KXUNDERHARRIS markets

The 9 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 Abdul El-Sayed underperform Kamala Harris in Michigan?: Abdul El-SayedKXUNDERHARRIS-27JAN04-AELScloses 2027-01-04 13:59 UTC
Will Angie Nixon underperform Kamala Harris in Florida?: Angie NixonKXUNDERHARRIS-27JAN04-ANIXcloses 2027-01-04 13:59 UTC
Will Chris Pappas underperform Kamala Harris in New Hampshire?: Chris PappasKXUNDERHARRIS-27JAN04-CPAPcloses 2027-01-04 13:59 UTC
Will David Jolly underperform Kamala Harris in Florida?: David JollyKXUNDERHARRIS-27JAN04-DJOLcloses 2027-01-04 13:59 UTC
Will Keisha Lance Bottoms underperform Kamala Harris in Georgia?: Keisha Lance BottomsKXUNDERHARRIS-27JAN04-KBOTcloses 2027-01-04 13:59 UTC
Will Kathy Hochul underperform Kamala Harris in New York?: Kathy HochulKXUNDERHARRIS-27JAN04-KHOCcloses 2027-01-04 13:59 UTC
Will Peggy Flanagan underperform Kamala Harris in Minnesota?: Peggy FlanaganKXUNDERHARRIS-27JAN04-PFLAcloses 2027-01-04 13:59 UTC
Will Troy Jackson underperform Kamala Harris in Maine?: Troy JacksonKXUNDERHARRIS-27JAN04-TJACcloses 2027-01-04 13:59 UTC
Will Tina Kotek underperform Kamala Harris in Oregon?: Tina KotekKXUNDERHARRIS-27JAN04-TKOTcloses 2027-01-04 13:59 UTC

Coverage notes for KXUNDERHARRIS

  • First day on disk: 2026-09-28. The series' first book appeared then. New days are added daily.
  • Trades before 2026-09-27. Kalshi's historical API has no tick-level order book, so earlier KXUNDERHARRIS 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 KXUNDERHARRIS-.
  • 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 KXUNDERHARRIS, every table, is about 21 MB. Bought for Kalshi, Starter ($29/mo) carries top of book, trades and the ticker for every series plus one series of your choice, KXUNDERHARRIS 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: KXUNDERHARRIS 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