OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

MRK $140.00 Call

MRK280121C00140000

Latest saved OI1,422Oct 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
MRK $140.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 1,4537260 2026-10-02: 1,434 OI2026-10-05: 1,434 OI2026-10-06: 1,447 OI2026-10-07: 1,447 OI2026-10-08: 1,447 OI2026-10-09: 1,452 OI2026-10-13: 1,453 OI2026-10-14: 1,453 OI2026-10-15: 1,425 OI2026-10-16: 1,424 OI2026-10-21: 1,424 OI2026-10-23: 1,422 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

MRK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,422-2
Oct 21, 20261,4240
Oct 16, 20261,424-1
Oct 15, 20261,425-28
Oct 14, 20261,4530
Oct 13, 20261,453+1
Oct 09, 20261,452+5
Oct 08, 20261,4470
Oct 07, 20261,4470
Oct 06, 20261,447+13
Oct 05, 20261,4340
Oct 02, 20261,434No prior observation