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Contract OI history

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Jan 21, 2028 EXPIRATION

MRK $185.00 Call

MRK280121C00185000

Latest saved OI1,077Oct 23, 2026
Last change+3vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $185.00 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. 1,0775380 2026-10-02: 73 OI2026-10-05: 73 OI2026-10-06: 1,072 OI2026-10-07: 1,072 OI2026-10-08: 1,072 OI2026-10-09: 1,072 OI2026-10-13: 1,072 OI2026-10-14: 1,072 OI2026-10-15: 1,072 OI2026-10-16: 1,071 OI2026-10-21: 1,074 OI2026-10-23: 1,077 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, 2026Viewing1,077+3
Oct 21, 20261,074+3
Oct 16, 20261,071-1
Oct 15, 20261,0720
Oct 14, 20261,0720
Oct 13, 20261,0720
Oct 09, 20261,0720
Oct 08, 20261,0720
Oct 07, 20261,0720
Oct 06, 20261,072+999
Oct 05, 2026730
Oct 02, 202673No prior observation