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Contract OI history

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Oct 23, 2026 EXPIRATION

BILL $40.00 Put

BILL261023P00040000

Latest saved OI21Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BILL $40.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 22110 2026-10-02: 2 OI2026-10-05: 12 OI2026-10-06: 12 OI2026-10-07: 12 OI2026-10-08: 12 OI2026-10-09: 12 OI2026-10-13: 12 OI2026-10-14: 22 OI2026-10-15: 22 OI2026-10-16: 21 OI2026-10-21: 21 OI2026-10-23: 21 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

BILL contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing210
Oct 21, 2026210
Oct 16, 202621-1
Oct 15, 2026220
Oct 14, 202622+10
Oct 13, 2026120
Oct 09, 2026120
Oct 08, 2026120
Oct 07, 2026120
Oct 06, 2026120
Oct 05, 202612+10
Oct 02, 20262No prior observation