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Contract OI history

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Nov 20, 2026 EXPIRATION

ACMR $55.00 Put

ACMR261120P00055000

Latest saved OI176Oct 21, 2026
Last change+20vs previous saved observation
Saved market days5Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ACMR $55.00 put open interest history 5 saved observations from 2026-10-09 to 2026-10-21. Exact values and changes are listed in the table below. 176880 2026-10-09: 127 OI2026-10-13: 132 OI2026-10-14: 132 OI2026-10-16: 156 OI2026-10-21: 176 OI Oct 09, 2026Oct 21, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

ACMR contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 21, 2026Viewing176+20
Oct 16, 2026156+24
Oct 14, 20261320
Oct 13, 2026132+5
Oct 09, 2026127No prior observation