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Contract OI history

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Dec 18, 2026 EXPIRATION

MCK $840.00 Put

MCK261218P00840000

Latest saved OI160Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MCK $840.00 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. 163810 2026-10-02: 161 OI2026-10-05: 161 OI2026-10-06: 162 OI2026-10-07: 162 OI2026-10-08: 162 OI2026-10-09: 162 OI2026-10-13: 163 OI2026-10-14: 163 OI2026-10-15: 162 OI2026-10-16: 162 OI2026-10-21: 160 OI2026-10-23: 160 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

MCK contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1600
Oct 21, 2026160-2
Oct 16, 20261620
Oct 15, 2026162-1
Oct 14, 20261630
Oct 13, 2026163+1
Oct 09, 20261620
Oct 08, 20261620
Oct 07, 20261620
Oct 06, 2026162+1
Oct 05, 20261610
Oct 02, 2026161No prior observation