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Contract OI history

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Dec 18, 2026 EXPIRATION

ALK $42.50 Put

ALK261218P00042500

Latest saved OI175Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ALK $42.50 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. 187930 2026-10-02: 187 OI2026-10-05: 171 OI2026-10-06: 171 OI2026-10-07: 175 OI2026-10-08: 175 OI2026-10-09: 175 OI2026-10-13: 175 OI2026-10-14: 174 OI2026-10-15: 180 OI2026-10-16: 174 OI2026-10-21: 174 OI2026-10-23: 175 OI Oct 02, 2026Oct 23, 2026

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

ALK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing175+1
Oct 21, 20261740
Oct 16, 2026174-6
Oct 15, 2026180+6
Oct 14, 2026174-1
Oct 13, 20261750
Oct 09, 20261750
Oct 08, 20261750
Oct 07, 2026175+4
Oct 06, 20261710
Oct 05, 2026171-16
Oct 02, 2026187No prior observation