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Contract OI history

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Oct 23, 2026 EXPIRATION

MRK $143.00 Put

MRK261023P00143000

Latest saved OI411Oct 23, 2026
Last change+213vs 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. 4112050 2026-10-02: 142 OI2026-10-05: 142 OI2026-10-06: 143 OI2026-10-07: 172 OI2026-10-08: 172 OI2026-10-09: 152 OI2026-10-13: 155 OI2026-10-14: 155 OI2026-10-15: 162 OI2026-10-16: 157 OI2026-10-21: 198 OI2026-10-23: 411 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, 2026Viewing411+213
Oct 21, 2026198+41
Oct 16, 2026157-5
Oct 15, 2026162+7
Oct 14, 20261550
Oct 13, 2026155+3
Oct 09, 2026152-20
Oct 08, 20261720
Oct 07, 2026172+29
Oct 06, 2026143+1
Oct 05, 20261420
Oct 02, 2026142No prior observation