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Contract OI history

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Oct 30, 2026 EXPIRATION

MRK $143.00 Put

MRK261030P00143000

Latest saved OI895Oct 23, 2026
Last change+6vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $143.00 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. 8954470 2026-10-02: 43 OI2026-10-05: 52 OI2026-10-06: 55 OI2026-10-07: 56 OI2026-10-08: 56 OI2026-10-09: 56 OI2026-10-13: 57 OI2026-10-14: 57 OI2026-10-15: 70 OI2026-10-16: 70 OI2026-10-21: 889 OI2026-10-23: 895 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, 2026Viewing895+6
Oct 21, 2026889+819
Oct 16, 2026700
Oct 15, 202670+13
Oct 14, 2026570
Oct 13, 202657+1
Oct 09, 2026560
Oct 08, 2026560
Oct 07, 202656+1
Oct 06, 202655+3
Oct 05, 202652+9
Oct 02, 202643No prior observation