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Contract OI history

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Dec 18, 2026 EXPIRATION

ALK $27.50 Put

ALK261218P00027500

Latest saved OI133Oct 23, 2026
Last change+9vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ALK $27.50 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. 133660 2026-10-02: 111 OI2026-10-05: 111 OI2026-10-06: 111 OI2026-10-07: 111 OI2026-10-08: 111 OI2026-10-09: 111 OI2026-10-13: 111 OI2026-10-14: 111 OI2026-10-15: 113 OI2026-10-16: 113 OI2026-10-21: 124 OI2026-10-23: 133 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, 2026Viewing133+9
Oct 21, 2026124+11
Oct 16, 20261130
Oct 15, 2026113+2
Oct 14, 20261110
Oct 13, 20261110
Oct 09, 20261110
Oct 08, 20261110
Oct 07, 20261110
Oct 06, 20261110
Oct 05, 20261110
Oct 02, 2026111No prior observation