OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

PFE $21.00 Put

PFE270115P00021000

Latest saved OI4,691Oct 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 $21.00 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. 4,6932,3460 2026-10-02: 4,693 OI2026-10-05: 4,693 OI2026-10-06: 4,693 OI2026-10-07: 4,693 OI2026-10-08: 4,693 OI2026-10-09: 4,692 OI2026-10-13: 4,692 OI2026-10-14: 4,692 OI2026-10-15: 4,692 OI2026-10-16: 4,692 OI2026-10-21: 4,692 OI2026-10-23: 4,691 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, 2026Viewing4,691-1
Oct 21, 20264,6920
Oct 16, 20264,6920
Oct 15, 20264,6920
Oct 14, 20264,6920
Oct 13, 20264,6920
Oct 09, 20264,692-1
Oct 08, 20264,6930
Oct 07, 20264,6930
Oct 06, 20264,6930
Oct 05, 20264,6930
Oct 02, 20264,693No prior observation