OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

PFE $18.00 Put

PFE261120P00018000

Latest saved OI198Oct 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 $18.00 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. 198990 2026-10-02: 198 OI2026-10-05: 198 OI2026-10-06: 198 OI2026-10-07: 198 OI2026-10-08: 198 OI2026-10-09: 198 OI2026-10-13: 198 OI2026-10-14: 198 OI2026-10-15: 198 OI2026-10-16: 198 OI2026-10-21: 198 OI2026-10-23: 198 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, 2026Viewing1980
Oct 21, 20261980
Oct 16, 20261980
Oct 15, 20261980
Oct 14, 20261980
Oct 13, 20261980
Oct 09, 20261980
Oct 08, 20261980
Oct 07, 20261980
Oct 06, 20261980
Oct 05, 20261980
Oct 02, 2026198No prior observation