OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

MRK $100.00 Put

MRK280121P00100000

Latest saved OI2,323Oct 23, 2026
Last change+4vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $100.00 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. 2,3231,1610 2026-10-02: 2,319 OI2026-10-05: 2,319 OI2026-10-06: 2,319 OI2026-10-07: 2,319 OI2026-10-08: 2,319 OI2026-10-09: 2,319 OI2026-10-13: 2,319 OI2026-10-14: 2,319 OI2026-10-15: 2,319 OI2026-10-16: 2,319 OI2026-10-21: 2,319 OI2026-10-23: 2,323 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, 2026Viewing2,323+4
Oct 21, 20262,3190
Oct 16, 20262,3190
Oct 15, 20262,3190
Oct 14, 20262,3190
Oct 13, 20262,3190
Oct 09, 20262,3190
Oct 08, 20262,3190
Oct 07, 20262,3190
Oct 06, 20262,3190
Oct 05, 20262,3190
Oct 02, 20262,319No prior observation