OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

PFE $29.50 Put

PFE261120P00029500

Latest saved OI375Oct 23, 2026
Last change+93vs previous saved observation
Saved market days2Oct 21, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $29.50 put open interest history 2 saved observations from 2026-10-21 to 2026-10-23. Exact values and changes are listed in the table below. 3751870 2026-10-21: 282 OI2026-10-23: 375 OI Oct 21, 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, 2026Viewing375+93
Oct 21, 2026282No prior observation