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Contract OI history

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Dec 18, 2026 EXPIRATION

MRK $155.00 Call

MRK261218C00155000

Latest saved OI3,740Oct 23, 2026
Last change+35vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $155.00 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. 3,7821,8910 2026-10-02: 3,236 OI2026-10-05: 3,239 OI2026-10-06: 3,269 OI2026-10-07: 3,273 OI2026-10-08: 3,273 OI2026-10-09: 3,431 OI2026-10-13: 3,590 OI2026-10-14: 3,590 OI2026-10-15: 3,682 OI2026-10-16: 3,782 OI2026-10-21: 3,705 OI2026-10-23: 3,740 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, 2026Viewing3,740+35
Oct 21, 20263,705-77
Oct 16, 20263,782+100
Oct 15, 20263,682+92
Oct 14, 20263,5900
Oct 13, 20263,590+159
Oct 09, 20263,431+158
Oct 08, 20263,2730
Oct 07, 20263,273+4
Oct 06, 20263,269+30
Oct 05, 20263,239+3
Oct 02, 20263,236No prior observation