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Contract OI history

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Nov 20, 2026 EXPIRATION

MRK $140.00 Put

MRK261120P00140000

Latest saved OI4,228Oct 23, 2026
Last change-44vs 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. 4,3792,1890 2026-10-02: 2,539 OI2026-10-05: 2,546 OI2026-10-06: 3,098 OI2026-10-07: 3,104 OI2026-10-08: 3,104 OI2026-10-09: 4,379 OI2026-10-13: 4,213 OI2026-10-14: 4,213 OI2026-10-15: 4,212 OI2026-10-16: 4,229 OI2026-10-21: 4,272 OI2026-10-23: 4,228 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, 2026Viewing4,228-44
Oct 21, 20264,272+43
Oct 16, 20264,229+17
Oct 15, 20264,212-1
Oct 14, 20264,2130
Oct 13, 20264,213-166
Oct 09, 20264,379+1,275
Oct 08, 20263,1040
Oct 07, 20263,104+6
Oct 06, 20263,098+552
Oct 05, 20262,546+7
Oct 02, 20262,539No prior observation