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Contract OI history

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Oct 23, 2026 EXPIRATION

ACHR $4.00 Put

ACHR261023P00004000

Latest saved OI1,847Oct 23, 2026
Last change+21vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ACHR $4.00 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. 1,8479230 2026-10-02: 18 OI2026-10-05: 20 OI2026-10-06: 20 OI2026-10-07: 20 OI2026-10-08: 20 OI2026-10-09: 74 OI2026-10-13: 1,058 OI2026-10-14: 1,058 OI2026-10-15: 1,176 OI2026-10-16: 1,184 OI2026-10-21: 1,826 OI2026-10-23: 1,847 OI Oct 02, 2026Oct 23, 2026

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

ACHR contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,847+21
Oct 21, 20261,826+642
Oct 16, 20261,184+8
Oct 15, 20261,176+118
Oct 14, 20261,0580
Oct 13, 20261,058+984
Oct 09, 202674+54
Oct 08, 2026200
Oct 07, 2026200
Oct 06, 2026200
Oct 05, 202620+2
Oct 02, 202618No prior observation