OITracker Cboe delayed data

Contract OI history

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Oct 30, 2026 EXPIRATION

PFE $26.00 Put

PFE261030P00026000

Latest saved OI380Oct 23, 2026
Last change-1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $26.00 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. 3811900 2026-10-02: 208 OI2026-10-05: 237 OI2026-10-06: 364 OI2026-10-07: 350 OI2026-10-08: 350 OI2026-10-09: 367 OI2026-10-13: 357 OI2026-10-14: 357 OI2026-10-15: 369 OI2026-10-16: 372 OI2026-10-21: 381 OI2026-10-23: 380 OI Oct 02, 2026Oct 23, 2026

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

PFE contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing380-1
Oct 21, 2026381+9
Oct 16, 2026372+3
Oct 15, 2026369+12
Oct 14, 20263570
Oct 13, 2026357-10
Oct 09, 2026367+17
Oct 08, 20263500
Oct 07, 2026350-14
Oct 06, 2026364+127
Oct 05, 2026237+29
Oct 02, 2026208No prior observation