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Contract OI history

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Oct 23, 2026 EXPIRATION

MRK $129.00 Put

MRK261023P00129000

Latest saved OI19Oct 23, 2026
Last change+11vs previous saved observation
Saved market days9Oct 07, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $129.00 put open interest history 9 saved observations from 2026-10-07 to 2026-10-23. Exact values and changes are listed in the table below. 1990 2026-10-07: 0 OI2026-10-08: 0 OI2026-10-09: 5 OI2026-10-13: 8 OI2026-10-14: 8 OI2026-10-15: 8 OI2026-10-16: 8 OI2026-10-21: 8 OI2026-10-23: 19 OI Oct 07, 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, 2026Viewing19+11
Oct 21, 202680
Oct 16, 202680
Oct 15, 202680
Oct 14, 202680
Oct 13, 20268+3
Oct 09, 20265+5
Oct 08, 202600
Oct 07, 20260No prior observation