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Contract OI history

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Mar 19, 2027 EXPIRATION

MRK $140.00 Put

MRK270319P00140000

Latest saved OI777Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $140.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 7773880 2026-10-02: 735 OI2026-10-05: 742 OI2026-10-06: 749 OI2026-10-07: 750 OI2026-10-08: 750 OI2026-10-09: 752 OI2026-10-13: 755 OI2026-10-14: 755 OI2026-10-15: 757 OI2026-10-16: 758 OI2026-10-21: 776 OI2026-10-23: 777 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, 2026Viewing777+1
Oct 21, 2026776+18
Oct 16, 2026758+1
Oct 15, 2026757+2
Oct 14, 20267550
Oct 13, 2026755+3
Oct 09, 2026752+2
Oct 08, 20267500
Oct 07, 2026750+1
Oct 06, 2026749+7
Oct 05, 2026742+7
Oct 02, 2026735No prior observation