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Contract OI history

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Dec 17, 2027 EXPIRATION

MRK $55.00 Put

MRK271217P00055000

Latest saved OI323Oct 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 $55.00 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. 3661830 2026-10-02: 366 OI2026-10-05: 366 OI2026-10-06: 366 OI2026-10-07: 366 OI2026-10-08: 366 OI2026-10-09: 348 OI2026-10-13: 339 OI2026-10-14: 339 OI2026-10-15: 339 OI2026-10-16: 324 OI2026-10-21: 324 OI2026-10-23: 323 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, 2026Viewing323-1
Oct 21, 20263240
Oct 16, 2026324-15
Oct 15, 20263390
Oct 14, 20263390
Oct 13, 2026339-9
Oct 09, 2026348-18
Oct 08, 20263660
Oct 07, 20263660
Oct 06, 20263660
Oct 05, 20263660
Oct 02, 2026366No prior observation