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Contract OI history

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Mar 19, 2027 EXPIRATION

ALK $27.50 Put

ALK270319P00027500

Latest saved OI9Oct 23, 2026
Last change+2vs 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. 940 2026-10-02: 4 OI2026-10-05: 4 OI2026-10-06: 4 OI2026-10-07: 4 OI2026-10-08: 4 OI2026-10-09: 6 OI2026-10-13: 6 OI2026-10-14: 6 OI2026-10-15: 6 OI2026-10-16: 7 OI2026-10-21: 7 OI2026-10-23: 9 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, 2026Viewing9+2
Oct 21, 202670
Oct 16, 20267+1
Oct 15, 202660
Oct 14, 202660
Oct 13, 202660
Oct 09, 20266+2
Oct 08, 202640
Oct 07, 202640
Oct 06, 202640
Oct 05, 202640
Oct 02, 20264No prior observation