OITracker Cboe delayed data

Contract OI history

Back to MRK

Oct 23, 2026 EXPIRATION

MRK $144.00 Put

MRK261023P00144000

Latest saved OI791Oct 23, 2026
Last change+16vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $144.00 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. 7913950 2026-10-02: 640 OI2026-10-05: 641 OI2026-10-06: 640 OI2026-10-07: 641 OI2026-10-08: 641 OI2026-10-09: 649 OI2026-10-13: 649 OI2026-10-14: 649 OI2026-10-15: 671 OI2026-10-16: 652 OI2026-10-21: 775 OI2026-10-23: 791 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, 2026Viewing791+16
Oct 21, 2026775+123
Oct 16, 2026652-19
Oct 15, 2026671+22
Oct 14, 20266490
Oct 13, 20266490
Oct 09, 2026649+8
Oct 08, 20266410
Oct 07, 2026641+1
Oct 06, 2026640-1
Oct 05, 2026641+1
Oct 02, 2026640No prior observation