OITracker Cboe delayed data

Contract OI history

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Nov 06, 2026 EXPIRATION

PFE $21.00 Put

PFE261106P00021000

Latest saved OI8Oct 23, 2026
Last change0vs 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. 840 2026-10-02: 0 OI2026-10-05: 1 OI2026-10-06: 6 OI2026-10-07: 5 OI2026-10-08: 5 OI2026-10-09: 5 OI2026-10-13: 5 OI2026-10-14: 5 OI2026-10-15: 5 OI2026-10-16: 5 OI2026-10-21: 8 OI2026-10-23: 8 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, 2026Viewing80
Oct 21, 20268+3
Oct 16, 202650
Oct 15, 202650
Oct 14, 202650
Oct 13, 202650
Oct 09, 202650
Oct 08, 202650
Oct 07, 20265-1
Oct 06, 20266+5
Oct 05, 20261+1
Oct 02, 20260No prior observation