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Contract OI history

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Jan 21, 2028 EXPIRATION

MRK $165.00 Put

MRK280121P00165000

Latest saved OI478Oct 23, 2026
Last change-40vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $165.00 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. 7983990 2026-10-02: 798 OI2026-10-05: 798 OI2026-10-06: 798 OI2026-10-07: 798 OI2026-10-08: 798 OI2026-10-09: 798 OI2026-10-13: 538 OI2026-10-14: 538 OI2026-10-15: 538 OI2026-10-16: 538 OI2026-10-21: 518 OI2026-10-23: 478 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, 2026Viewing478-40
Oct 21, 2026518-20
Oct 16, 20265380
Oct 15, 20265380
Oct 14, 20265380
Oct 13, 2026538-260
Oct 09, 20267980
Oct 08, 20267980
Oct 07, 20267980
Oct 06, 20267980
Oct 05, 20267980
Oct 02, 2026798No prior observation