▌tickfoundry
capture livesign inget the data →
kalshi historical data / politics / KXBILLS
§politics

Bills become law this year?, tick by tick.
Kalshi series KXBILLS: order book and trades, 2026-09-27 → 2026-10-22.

The order-book and trade history of Kalshi's Bills become law this year? series (a new event every year): 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 days2026-09-27 → 2026-10-22 · every day since its first · ~4 MB per day · 92 MB on disk · 30 open markets
pull KXBILLS days →schemapricing

What a KXBILLS 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.

~177 kB per KXBILLS 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.

~3 MB per KXBILLS day
Tradeskalshi_trades

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

~19 kB per KXBILLS 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.

~163 kB per KXBILLS day

KXBILLS 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 legislation that would require Treasury to mint and issue $2.50 coins to mark America’s 250th anniversary become law before Jan 1, 2027?: $2.50 CoinKXBILLS-250Ccloses 2027-01-01 15:00 UTC
Will legislation principally aimed at curbing federal coercion of speech intermediaries (social media platforms, AI systems, broadcasters), including through a private right of action against agencies or officials, monetary damages, or mandatory disclosure of government-to-platform communications become law before Jan 1, 2027?: JAWBONE ActKXBILLS-26-JAWBcloses 2027-01-01 15:00 UTC
Will legislation that limits out-of-pocket costs for insulin for privately insured patients to no more than $40 per month, per 30-day supply, or equivalent monthly period become law before Jan 1, 2027?: Insulin cost capKXBILLS-26JUN-INSULINcloses 2027-01-01 15:00 UTC
Will legislation that imposes enhanced federal safety requirements on freight rail carriers and trains transporting hazardous materials (e.g., mandates for wayside defect detectors, two-person crews, tank car safety standards, and state emergency notification) become law before Jan 1, 2027?: Railway safety billKXBILLS-26MAY-RAILcloses 2027-01-01 15:00 UTC
Will legislation that bars government agencies or private entities from using ADS-B aircraft-tracking data to identify aircraft for the purpose of obtaining revenue from the aircraft owner or operator without consent become law before Jan 1, 2027?: ADS-B revenue-use restrictionKXBILLS-ADSBcloses 2027-01-01 15:00 UTC
Will legislation that subjects covered AI-chip exports to mandatory congressional review with a statutory blocking period become law before Jan 1, 2027?: AI-chip export licensingKXBILLS-AIOcloses 2027-01-01 15:00 UTC
Will legislation that renames Washington Dulles International Airport after Donald Trump become law before Jan 1, 2027?: Trump AirportKXBILLS-AIRPcloses 2027-01-01 15:00 UTC
Will legislation that authorizes funding for construction of a presidential ballroom become law before Jan 1, 2027?: White House ballroom fundingKXBILLS-BALLcloses 2027-01-01 15:00 UTC
Will legislation that conditions eligibility for Department of Defense contracts on covered contractors refraining from stock buybacks become law before Jan 1, 2027?: Defense-contractor stock-buyback restrictionsKXBILLS-BBACcloses 2027-01-01 15:00 UTC
Will legislation that changes the official name of Fort Bragg, North Carolina, to Fort Liberty become law before Jan 1, 2027?: Fort Bragg → Fort LibertyKXBILLS-BRAGGcloses 2027-01-01 15:00 UTC
Will legislation that requires two unaffiliated networks for processing covered credit-card transactions become law before Jan 1, 2027?: Credit-card routing competitionKXBILLS-CCRcloses 2027-01-01 15:00 UTC
Will legislation that requires location-verification security mechanisms on certain advanced chips before export become law before Jan 1, 2027?: Export-control chip securityKXBILLS-CHIPcloses 2027-01-01 15:00 UTC

Coverage notes for KXBILLS

  • 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 KXBILLS 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 KXBILLS-.
  • 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 KXBILLS, every table, is about 107 MB. Bought for Kalshi, Starter ($29/mo) carries top of book, trades and the ticker for every series plus one series of your choice, KXBILLS 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: KXBILLS at full depth →L10: every series at 10 levelsL25: every series, 25 levelsfree sample day

Other politics series on Kalshi

Trump approval ratingVoteHub GCBWho will be charged with a federal crimeWho will leave the Trump administrationPresident RCP approval rating this weekWhat countries will Trump visit this year?Mar-a-Lago tripsEpstein listNumber of Trump Truth Social posts this week?Which states will Trump visit this year?Will Trump do anything today?Who will Trump meet this year?Traffic through the Strait of HormuzNext UN Secretary-GeneralWho will Trump pardon?Traffic through the Bab al-Mandab StraitTrump pardonsPresident impeachedNobel Peace PrizeARRESTS… the whole venue