What will the US effective tariff rate be? is a one-time politics series on Kalshi, with markets like “Will the US effective tariff rate (customs duties collected ÷ nominal imports of goods, represented by B235RC1Q027SBEA ÷ A255RC1Q027SBEA) for Q3 2026 be above 13%?”. The Kalshi Eye archive lists 11 of its markets and has 13 days of daily Parquet files from October 12, 2026 to October 24, 2026 (2 MB), with every order book change and trade.

Venue: Kalshi, series KXEFFTARIFF
Category: Politics, one-time
Markets: 11 (0 settled, 11 open)
Files: 13 days, October 12, 2026 to October 24, 2026, 2 MB, 261,126 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 What will the US effective tariff rate be? 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 KXEFFTARIFF trade on October 24, 2026, in DuckDB:

SELECT ts_recv, ticker, yes_price, size, taker_side
FROM 'kalshieye-data/trades/date=2026-10-24/series=KXEFFTARIFF/trades-KXEFFTARIFF-2026-10-24.parquet'
ORDER BY ts_recv;

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

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