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Contract OI history

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Nov 27, 2026 EXPIRATION

ACHR $4.00 Put

ACHR261127P00004000

Latest saved OI350Oct 23, 2026
Last change+13vs previous saved observation
Saved market days9Oct 07, 2026 onwards
Daily open interest Hover a point for its date and OI
ACHR $4.00 put open interest history 9 saved observations from 2026-10-07 to 2026-10-23. Exact values and changes are listed in the table below. 3501750 2026-10-07: 0 OI2026-10-08: 0 OI2026-10-09: 0 OI2026-10-13: 38 OI2026-10-14: 38 OI2026-10-15: 212 OI2026-10-16: 216 OI2026-10-21: 337 OI2026-10-23: 350 OI Oct 07, 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, 2026Viewing350+13
Oct 21, 2026337+121
Oct 16, 2026216+4
Oct 15, 2026212+174
Oct 14, 2026380
Oct 13, 202638+38
Oct 09, 202600
Oct 08, 202600
Oct 07, 20260No prior observation