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Contract OI history

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Jan 15, 2027 EXPIRATION

MCK $840.00 Put

MCK270115P00840000

Latest saved OI259Oct 23, 2026
Last change+22vs 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. 2591290 2026-10-02: 230 OI2026-10-05: 230 OI2026-10-06: 234 OI2026-10-07: 234 OI2026-10-08: 234 OI2026-10-09: 238 OI2026-10-13: 238 OI2026-10-14: 238 OI2026-10-15: 239 OI2026-10-16: 240 OI2026-10-21: 237 OI2026-10-23: 259 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, 2026Viewing259+22
Oct 21, 2026237-3
Oct 16, 2026240+1
Oct 15, 2026239+1
Oct 14, 20262380
Oct 13, 20262380
Oct 09, 2026238+4
Oct 08, 20262340
Oct 07, 20262340
Oct 06, 2026234+4
Oct 05, 20262300
Oct 02, 2026230No prior observation