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Contract OI history

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Dec 18, 2026 EXPIRATION

ALK $40.00 Put

ALK261218P00040000

Latest saved OI399Oct 23, 2026
Last change-39vs 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. 4382190 2026-10-02: 401 OI2026-10-05: 401 OI2026-10-06: 401 OI2026-10-07: 402 OI2026-10-08: 402 OI2026-10-09: 405 OI2026-10-13: 406 OI2026-10-14: 403 OI2026-10-15: 402 OI2026-10-16: 411 OI2026-10-21: 438 OI2026-10-23: 399 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, 2026Viewing399-39
Oct 21, 2026438+27
Oct 16, 2026411+9
Oct 15, 2026402-1
Oct 14, 2026403-3
Oct 13, 2026406+1
Oct 09, 2026405+3
Oct 08, 20264020
Oct 07, 2026402+1
Oct 06, 20264010
Oct 05, 20264010
Oct 02, 2026401No prior observation