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Contract OI history

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Dec 18, 2026 EXPIRATION

MRK $50.00 Put

MRK261218P00050000

Latest saved OI418Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $50.00 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. 4182090 2026-10-02: 409 OI2026-10-05: 409 OI2026-10-06: 408 OI2026-10-07: 408 OI2026-10-08: 408 OI2026-10-09: 418 OI2026-10-13: 418 OI2026-10-14: 418 OI2026-10-15: 418 OI2026-10-16: 418 OI2026-10-21: 418 OI2026-10-23: 418 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, 2026Viewing4180
Oct 21, 20264180
Oct 16, 20264180
Oct 15, 20264180
Oct 14, 20264180
Oct 13, 20264180
Oct 09, 2026418+10
Oct 08, 20264080
Oct 07, 20264080
Oct 06, 2026408-1
Oct 05, 20264090
Oct 02, 2026409No prior observation