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Contract OI history

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Nov 20, 2026 EXPIRATION

ACHR $4.00 Put

ACHR261120P00004000

Latest saved OI2,377Oct 23, 2026
Last change+118vs 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. 2,3771,1880 2026-10-02: 210 OI2026-10-05: 291 OI2026-10-06: 392 OI2026-10-07: 662 OI2026-10-08: 662 OI2026-10-09: 821 OI2026-10-13: 1,411 OI2026-10-14: 1,411 OI2026-10-15: 1,681 OI2026-10-16: 1,823 OI2026-10-21: 2,259 OI2026-10-23: 2,377 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, 2026Viewing2,377+118
Oct 21, 20262,259+436
Oct 16, 20261,823+142
Oct 15, 20261,681+270
Oct 14, 20261,4110
Oct 13, 20261,411+590
Oct 09, 2026821+159
Oct 08, 20266620
Oct 07, 2026662+270
Oct 06, 2026392+101
Oct 05, 2026291+81
Oct 02, 2026210No prior observation