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Contract OI history

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Jan 21, 2028 EXPIRATION

MRK $115.00 Call

MRK280121C00115000

Latest saved OI517Oct 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 $115.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 5192590 2026-10-02: 505 OI2026-10-05: 505 OI2026-10-06: 519 OI2026-10-07: 519 OI2026-10-08: 519 OI2026-10-09: 518 OI2026-10-13: 518 OI2026-10-14: 518 OI2026-10-15: 518 OI2026-10-16: 518 OI2026-10-21: 518 OI2026-10-23: 517 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, 2026Viewing517-1
Oct 21, 20265180
Oct 16, 20265180
Oct 15, 20265180
Oct 14, 20265180
Oct 13, 20265180
Oct 09, 2026518-1
Oct 08, 20265190
Oct 07, 20265190
Oct 06, 2026519+14
Oct 05, 20265050
Oct 02, 2026505No prior observation