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Contract OI history

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Jan 21, 2028 EXPIRATION

ALK $27.50 Put

ALK280121P00027500

Latest saved OI25Oct 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. 25120 2026-10-02: 23 OI2026-10-05: 23 OI2026-10-06: 23 OI2026-10-07: 23 OI2026-10-08: 23 OI2026-10-09: 23 OI2026-10-13: 23 OI2026-10-14: 23 OI2026-10-15: 23 OI2026-10-16: 23 OI2026-10-21: 23 OI2026-10-23: 25 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, 2026Viewing25+2
Oct 21, 2026230
Oct 16, 2026230
Oct 15, 2026230
Oct 14, 2026230
Oct 13, 2026230
Oct 09, 2026230
Oct 08, 2026230
Oct 07, 2026230
Oct 06, 2026230
Oct 05, 2026230
Oct 02, 202623No prior observation