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Contract OI history

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Nov 13, 2026 EXPIRATION

ACHR $4.50 Put

ACHR261113P00004500

Latest saved OI1,868Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ACHR $4.50 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. 1,8689340 2026-10-02: 0 OI2026-10-05: 74 OI2026-10-06: 192 OI2026-10-07: 240 OI2026-10-08: 240 OI2026-10-09: 285 OI2026-10-13: 873 OI2026-10-14: 873 OI2026-10-15: 1,080 OI2026-10-16: 1,404 OI2026-10-21: 1,867 OI2026-10-23: 1,868 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, 2026Viewing1,868+1
Oct 21, 20261,867+463
Oct 16, 20261,404+324
Oct 15, 20261,080+207
Oct 14, 20268730
Oct 13, 2026873+588
Oct 09, 2026285+45
Oct 08, 20262400
Oct 07, 2026240+48
Oct 06, 2026192+118
Oct 05, 202674+74
Oct 02, 20260No prior observation