OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

MRK $155.00 Put

MRK270115P00155000

Latest saved OI125Oct 23, 2026
Last change-9vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
MRK $155.00 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. 153760 2026-10-02: 153 OI2026-10-05: 145 OI2026-10-06: 145 OI2026-10-07: 145 OI2026-10-08: 145 OI2026-10-09: 136 OI2026-10-13: 135 OI2026-10-14: 135 OI2026-10-15: 134 OI2026-10-16: 134 OI2026-10-21: 134 OI2026-10-23: 125 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, 2026Viewing125-9
Oct 21, 20261340
Oct 16, 20261340
Oct 15, 2026134-1
Oct 14, 20261350
Oct 13, 2026135-1
Oct 09, 2026136-9
Oct 08, 20261450
Oct 07, 20261450
Oct 06, 20261450
Oct 05, 2026145-8
Oct 02, 2026153No prior observation