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Contract OI history

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Dec 18, 2026 EXPIRATION

MRK $190.00 Call

MRK261218C00190000

Latest saved OI986Oct 23, 2026
Last change+20vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $190.00 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. 9864930 2026-10-02: 935 OI2026-10-05: 935 OI2026-10-06: 966 OI2026-10-07: 966 OI2026-10-08: 966 OI2026-10-09: 966 OI2026-10-13: 966 OI2026-10-14: 966 OI2026-10-15: 966 OI2026-10-16: 966 OI2026-10-21: 966 OI2026-10-23: 986 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, 2026Viewing986+20
Oct 21, 20269660
Oct 16, 20269660
Oct 15, 20269660
Oct 14, 20269660
Oct 13, 20269660
Oct 09, 20269660
Oct 08, 20269660
Oct 07, 20269660
Oct 06, 2026966+31
Oct 05, 20269350
Oct 02, 2026935No prior observation