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Oct 23, 2026 EXPIRATION

ACHR $4.50 Put

ACHR261023P00004500

Latest saved OI335Oct 23, 2026
Last change-69vs 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. 4392190 2026-10-02: 190 OI2026-10-05: 229 OI2026-10-06: 243 OI2026-10-07: 287 OI2026-10-08: 287 OI2026-10-09: 308 OI2026-10-13: 404 OI2026-10-14: 404 OI2026-10-15: 427 OI2026-10-16: 439 OI2026-10-21: 404 OI2026-10-23: 335 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, 2026Viewing335-69
Oct 21, 2026404-35
Oct 16, 2026439+12
Oct 15, 2026427+23
Oct 14, 20264040
Oct 13, 2026404+96
Oct 09, 2026308+21
Oct 08, 20262870
Oct 07, 2026287+44
Oct 06, 2026243+14
Oct 05, 2026229+39
Oct 02, 2026190No prior observation