Closest house race is a one-time elections series on Kalshi, with markets like “Will WI-03 have the smallest margin of victory in the November 3, 2026 U.S. House general elections?”. The Kalshi Eye archive lists 34 of its markets and has 12 days of daily Parquet files from October 12, 2026 to October 23, 2026 (1 MB), with every order book change and trade.

Venue: Kalshi, series KXCLOSESTHOUSE
Category: Elections, one-time
Markets: 34 (0 settled, 34 open)
Files: 12 days, October 12, 2026 to October 23, 2026, 1 MB, 493,496 rows
Datasets: Order book (L2, incremental), Order book snapshots (top 10, 1 second), Top of book (every change), Top of book (1-minute bars)

Open Closest house race in Markets to see every day and market, then export the days you need. Free sample files of each dataset are on the Kalshi data page.

Reading the files

KXCLOSESTHOUSE minute bars on October 23, 2026, in DuckDB:

SELECT minute, ticker, mid_close, yes_bid_close, yes_ask_close, trade_count
FROM 'kalshieye-data/bbo_1m/date=2026-10-23/series=KXCLOSESTHOUSE/bbo_1m-KXCLOSESTHOUSE-2026-10-23.parquet'
ORDER BY minute;

To test a strategy on this series, see How to backtest Kalshi markets.

Related Kalshi series

Vote percentages in US general elections (KXVOTEGENERAL): 9,314 markets, 12 days of files
Midterm margin of victory (KXMIDTERMMOV): 5,190 markets, 12 days of files
Midterm Voter Turnout (KXMIDTERMVOTETURN): 4,951 markets, 12 days of files
House Race Winner? (KXHOUSERACE): 708 markets, 12 days of files
County vote percentages (KXVOTECOUNTY): 460 markets, 12 days of files
Which state ballot measures will pass? (KXSTATEBALLOTMEASURE): 125 markets, 12 days of files

Figures as of October 24, 2026. All Kalshi series with pages are listed on Kalshi series.