OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

ALK $40.00 Put

ALK270115P00040000

Latest saved OI1,219Oct 23, 2026
Last change+1vs 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. 1,2196090 2026-10-02: 437 OI2026-10-05: 452 OI2026-10-06: 452 OI2026-10-07: 452 OI2026-10-08: 456 OI2026-10-09: 467 OI2026-10-13: 467 OI2026-10-14: 477 OI2026-10-15: 477 OI2026-10-16: 482 OI2026-10-21: 1,218 OI2026-10-23: 1,219 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, 2026Viewing1,219+1
Oct 21, 20261,218+736
Oct 16, 2026482+5
Oct 15, 20264770
Oct 14, 2026477+10
Oct 13, 20264670
Oct 09, 2026467+11
Oct 08, 2026456+4
Oct 07, 20264520
Oct 06, 20264520
Oct 05, 2026452+15
Oct 02, 2026437No prior observation