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Contract OI history

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Dec 18, 2026 EXPIRATION

MRK $165.00 Call

MRK261218C00165000

Latest saved OI4,839Oct 23, 2026
Last change+615vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $165.00 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. 4,8392,4190 2026-10-02: 1,166 OI2026-10-05: 1,175 OI2026-10-06: 1,163 OI2026-10-07: 1,167 OI2026-10-08: 1,167 OI2026-10-09: 1,198 OI2026-10-13: 1,200 OI2026-10-14: 1,200 OI2026-10-15: 1,207 OI2026-10-16: 4,004 OI2026-10-21: 4,224 OI2026-10-23: 4,839 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, 2026Viewing4,839+615
Oct 21, 20264,224+220
Oct 16, 20264,004+2,797
Oct 15, 20261,207+7
Oct 14, 20261,2000
Oct 13, 20261,200+2
Oct 09, 20261,198+31
Oct 08, 20261,1670
Oct 07, 20261,167+4
Oct 06, 20261,163-12
Oct 05, 20261,175+9
Oct 02, 20261,166No prior observation