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Contract OI history

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Oct 30, 2026 EXPIRATION

MRK $165.00 Call

MRK261030C00165000

Latest saved OI4,289Oct 23, 2026
Last change+4,075vs 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. 4,2892,1440 2026-10-02: 179 OI2026-10-05: 179 OI2026-10-06: 186 OI2026-10-07: 186 OI2026-10-08: 186 OI2026-10-09: 188 OI2026-10-13: 194 OI2026-10-14: 194 OI2026-10-15: 195 OI2026-10-16: 195 OI2026-10-21: 214 OI2026-10-23: 4,289 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, 2026Viewing4,289+4,075
Oct 21, 2026214+19
Oct 16, 20261950
Oct 15, 2026195+1
Oct 14, 20261940
Oct 13, 2026194+6
Oct 09, 2026188+2
Oct 08, 20261860
Oct 07, 20261860
Oct 06, 2026186+7
Oct 05, 20261790
Oct 02, 2026179No prior observation