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Contract OI history

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Jan 21, 2028 EXPIRATION

MRK $190.00 Call

MRK280121C00190000

Latest saved OI753Oct 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. 7733860 2026-10-02: 351 OI2026-10-05: 351 OI2026-10-06: 351 OI2026-10-07: 351 OI2026-10-08: 351 OI2026-10-09: 351 OI2026-10-13: 351 OI2026-10-14: 351 OI2026-10-15: 773 OI2026-10-16: 773 OI2026-10-21: 773 OI2026-10-23: 753 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, 2026Viewing753-20
Oct 21, 20267730
Oct 16, 20267730
Oct 15, 2026773+422
Oct 14, 20263510
Oct 13, 20263510
Oct 09, 20263510
Oct 08, 20263510
Oct 07, 20263510
Oct 06, 20263510
Oct 05, 20263510
Oct 02, 2026351No prior observation