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Contract OI history

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Dec 18, 2026 EXPIRATION

MRK $140.00 Put

MRK261218P00140000

Latest saved OI1,408Oct 23, 2026
Last change+71vs 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. 1,4087040 2026-10-02: 1,320 OI2026-10-05: 1,334 OI2026-10-06: 1,253 OI2026-10-07: 1,254 OI2026-10-08: 1,254 OI2026-10-09: 1,274 OI2026-10-13: 1,278 OI2026-10-14: 1,278 OI2026-10-15: 1,320 OI2026-10-16: 1,333 OI2026-10-21: 1,337 OI2026-10-23: 1,408 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, 2026Viewing1,408+71
Oct 21, 20261,337+4
Oct 16, 20261,333+13
Oct 15, 20261,320+42
Oct 14, 20261,2780
Oct 13, 20261,278+4
Oct 09, 20261,274+20
Oct 08, 20261,2540
Oct 07, 20261,254+1
Oct 06, 20261,253-81
Oct 05, 20261,334+14
Oct 02, 20261,320No prior observation