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Contract OI history

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May 21, 2027 EXPIRATION

ALK $40.00 Put

ALK270521P00040000

Latest saved OI136Oct 23, 2026
Last change-35vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ALK $40.00 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. 171850 2026-10-02: 128 OI2026-10-05: 128 OI2026-10-06: 128 OI2026-10-07: 128 OI2026-10-08: 128 OI2026-10-09: 128 OI2026-10-13: 163 OI2026-10-14: 163 OI2026-10-15: 164 OI2026-10-16: 170 OI2026-10-21: 171 OI2026-10-23: 136 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, 2026Viewing136-35
Oct 21, 2026171+1
Oct 16, 2026170+6
Oct 15, 2026164+1
Oct 14, 20261630
Oct 13, 2026163+35
Oct 09, 20261280
Oct 08, 20261280
Oct 07, 20261280
Oct 06, 20261280
Oct 05, 20261280
Oct 02, 2026128No prior observation