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Contract OI history

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Dec 18, 2026 EXPIRATION

ALC $42.50 Put

ALC261218P00042500

Latest saved OI325Oct 20, 2026
Last change0vs previous saved observation
Saved market days10Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ALC $42.50 put open interest history 10 saved observations from 2026-10-02 to 2026-10-20. Exact values and changes are listed in the table below. 3251620 2026-10-02: 325 OI2026-10-05: 325 OI2026-10-06: 325 OI2026-10-07: 325 OI2026-10-08: 325 OI2026-10-09: 325 OI2026-10-13: 325 OI2026-10-15: 325 OI2026-10-16: 325 OI2026-10-20: 325 OI Oct 02, 2026Oct 20, 2026

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

ALC contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 20, 2026Viewing3250
Oct 16, 20263250
Oct 15, 20263250
Oct 13, 20263250
Oct 09, 20263250
Oct 08, 20263250
Oct 07, 20263250
Oct 06, 20263250
Oct 05, 20263250
Oct 02, 2026325No prior observation