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Contract OI history

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Jan 21, 2028 EXPIRATION

ACHR $4.00 Put

ACHR280121P00004000

Latest saved OI1,948Oct 23, 2026
Last change+9vs 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. 1,9489740 2026-10-02: 1,490 OI2026-10-05: 1,543 OI2026-10-06: 1,563 OI2026-10-07: 1,586 OI2026-10-08: 1,586 OI2026-10-09: 1,578 OI2026-10-13: 1,621 OI2026-10-14: 1,621 OI2026-10-15: 1,724 OI2026-10-16: 1,777 OI2026-10-21: 1,939 OI2026-10-23: 1,948 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, 2026Viewing1,948+9
Oct 21, 20261,939+162
Oct 16, 20261,777+53
Oct 15, 20261,724+103
Oct 14, 20261,6210
Oct 13, 20261,621+43
Oct 09, 20261,578-8
Oct 08, 20261,5860
Oct 07, 20261,586+23
Oct 06, 20261,563+20
Oct 05, 20261,543+53
Oct 02, 20261,490No prior observation