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Contract OI history

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Jan 21, 2028 EXPIRATION

ACHR $10.00 Put

ACHR280121P00010000

Latest saved OI2,431Oct 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 $10.00 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. 2,4311,2150 2026-10-02: 2,002 OI2026-10-05: 2,205 OI2026-10-06: 2,255 OI2026-10-07: 2,256 OI2026-10-08: 2,256 OI2026-10-09: 2,256 OI2026-10-13: 2,256 OI2026-10-14: 2,256 OI2026-10-15: 2,340 OI2026-10-16: 2,340 OI2026-10-21: 2,430 OI2026-10-23: 2,431 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, 2026Viewing2,431+1
Oct 21, 20262,430+90
Oct 16, 20262,3400
Oct 15, 20262,340+84
Oct 14, 20262,2560
Oct 13, 20262,2560
Oct 09, 20262,2560
Oct 08, 20262,2560
Oct 07, 20262,256+1
Oct 06, 20262,255+50
Oct 05, 20262,205+203
Oct 02, 20262,002No prior observation