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Contract OI history

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Mar 19, 2027 EXPIRATION

MRK $190.00 Call

MRK270319C00190000

Latest saved OI291Oct 23, 2026
Last change+16vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $190.00 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. 2911450 2026-10-02: 257 OI2026-10-05: 258 OI2026-10-06: 267 OI2026-10-07: 267 OI2026-10-08: 267 OI2026-10-09: 264 OI2026-10-13: 264 OI2026-10-14: 264 OI2026-10-15: 267 OI2026-10-16: 267 OI2026-10-21: 275 OI2026-10-23: 291 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, 2026Viewing291+16
Oct 21, 2026275+8
Oct 16, 20262670
Oct 15, 2026267+3
Oct 14, 20262640
Oct 13, 20262640
Oct 09, 2026264-3
Oct 08, 20262670
Oct 07, 20262670
Oct 06, 2026267+9
Oct 05, 2026258+1
Oct 02, 2026257No prior observation