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Contract OI history

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Dec 18, 2026 EXPIRATION

MRK $180.00 Call

MRK261218C00180000

Latest saved OI804Oct 23, 2026
Last change+24vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $180.00 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. 1,4757370 2026-10-02: 1,475 OI2026-10-05: 1,475 OI2026-10-06: 818 OI2026-10-07: 818 OI2026-10-08: 818 OI2026-10-09: 814 OI2026-10-13: 814 OI2026-10-14: 814 OI2026-10-15: 827 OI2026-10-16: 818 OI2026-10-21: 780 OI2026-10-23: 804 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, 2026Viewing804+24
Oct 21, 2026780-38
Oct 16, 2026818-9
Oct 15, 2026827+13
Oct 14, 20268140
Oct 13, 20268140
Oct 09, 2026814-4
Oct 08, 20268180
Oct 07, 20268180
Oct 06, 2026818-657
Oct 05, 20261,4750
Oct 02, 20261,475No prior observation