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Contract OI history

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Nov 27, 2026 EXPIRATION

ACHR $4.50 Put

ACHR261127P00004500

Latest saved OI411Oct 23, 2026
Last change+143vs previous saved observation
Saved market days9Oct 07, 2026 onwards
Daily open interest Hover a point for its date and OI
ACHR $4.50 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. 4112050 2026-10-07: 0 OI2026-10-08: 0 OI2026-10-09: 41 OI2026-10-13: 140 OI2026-10-14: 140 OI2026-10-15: 239 OI2026-10-16: 240 OI2026-10-21: 268 OI2026-10-23: 411 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, 2026Viewing411+143
Oct 21, 2026268+28
Oct 16, 2026240+1
Oct 15, 2026239+99
Oct 14, 20261400
Oct 13, 2026140+99
Oct 09, 202641+41
Oct 08, 202600
Oct 07, 20260No prior observation