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Contract OI history

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Oct 30, 2026 EXPIRATION

MRK $143.00 Call

MRK261030C00143000

Latest saved OI267Oct 23, 2026
Last change+121vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $143.00 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. 2671330 2026-10-02: 2 OI2026-10-05: 2 OI2026-10-06: 21 OI2026-10-07: 21 OI2026-10-08: 21 OI2026-10-09: 122 OI2026-10-13: 122 OI2026-10-14: 122 OI2026-10-15: 122 OI2026-10-16: 122 OI2026-10-21: 146 OI2026-10-23: 267 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, 2026Viewing267+121
Oct 21, 2026146+24
Oct 16, 20261220
Oct 15, 20261220
Oct 14, 20261220
Oct 13, 20261220
Oct 09, 2026122+101
Oct 08, 2026210
Oct 07, 2026210
Oct 06, 202621+19
Oct 05, 202620
Oct 02, 20262No prior observation