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Contract OI history

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Dec 18, 2026 EXPIRATION

ALK $37.50 Put

ALK261218P00037500

Latest saved OI337Oct 23, 2026
Last change+6vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ALK $37.50 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. 3711850 2026-10-02: 312 OI2026-10-05: 314 OI2026-10-06: 314 OI2026-10-07: 319 OI2026-10-08: 319 OI2026-10-09: 322 OI2026-10-13: 362 OI2026-10-14: 368 OI2026-10-15: 368 OI2026-10-16: 371 OI2026-10-21: 331 OI2026-10-23: 337 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, 2026Viewing337+6
Oct 21, 2026331-40
Oct 16, 2026371+3
Oct 15, 20263680
Oct 14, 2026368+6
Oct 13, 2026362+40
Oct 09, 2026322+3
Oct 08, 20263190
Oct 07, 2026319+5
Oct 06, 20263140
Oct 05, 2026314+2
Oct 02, 2026312No prior observation