Midterm margin of victory is a one-time elections series on Kalshi, with markets like “Will the margin of victory for Republicans in the North Carolina's 14th District House election be at least 25 percentage points?”. The Kalshi Eye archive lists 5,190 of its markets and has 12 days of daily Parquet files from October 12, 2026 to October 23, 2026 (565 MB), with every order book change and trade.

Venue: Kalshi, series KXMIDTERMMOV
Category: Elections, one-time
Markets: 5,190 (0 settled, 5,190 open)
Files: 12 days, October 12, 2026 to October 23, 2026, 565 MB, 83,801,089 rows
Datasets: Order book (L2, incremental), Order book snapshots (top 10, 1 second), Top of book (every change), Top of book (1-minute bars), Trades

Open Midterm margin of victory 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

Every KXMIDTERMMOV trade on October 23, 2026, in DuckDB:

SELECT ts_recv, ticker, yes_price, size, taker_side
FROM 'kalshieye-data/trades/date=2026-10-23/series=KXMIDTERMMOV/trades-KXMIDTERMMOV-2026-10-23.parquet'
ORDER BY ts_recv;

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 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
How many seats will party win in state? (KXHOUSEWINSTATE): 102 markets, 12 days of files

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