OITracker Cboe delayed data

Contract OI history

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Nov 27, 2026 EXPIRATION

PFE $25.00 Put

PFE261127P00025000

Latest saved OI4Oct 23, 2026
Last change-2vs previous saved observation
Saved market days9Oct 07, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $25.00 put open interest history 9 saved observations from 2026-10-07 to 2026-10-23. Exact values and changes are listed in the table below. 630 2026-10-07: 0 OI2026-10-08: 0 OI2026-10-09: 0 OI2026-10-13: 1 OI2026-10-14: 1 OI2026-10-15: 2 OI2026-10-16: 2 OI2026-10-21: 6 OI2026-10-23: 4 OI Oct 07, 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, 2026Viewing4-2
Oct 21, 20266+4
Oct 16, 202620
Oct 15, 20262+1
Oct 14, 202610
Oct 13, 20261+1
Oct 09, 202600
Oct 08, 202600
Oct 07, 20260No prior observation