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Contract OI history

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Dec 18, 2026 EXPIRATION

ACMR $42.50 Put

ACMR261218P00042500

Latest saved OI3Oct 21, 2026
Last change0vs previous saved observation
Saved market days2Oct 16, 2026 onwards
Daily open interest Hover a point for its date and OI
ACMR $42.50 put open interest history 2 saved observations from 2026-10-16 to 2026-10-21. Exact values and changes are listed in the table below. 310 2026-10-16: 3 OI2026-10-21: 3 OI Oct 16, 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, 2026Viewing30
Oct 16, 20263No prior observation