OITracker Cboe delayed data

Contract OI history

Back to PFE

Oct 23, 2026 EXPIRATION

PFE $28.50 Put

PFE261023P00028500

Latest saved OI1,339Oct 23, 2026
Last change+106vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $28.50 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. 1,3396690 2026-10-02: 262 OI2026-10-05: 262 OI2026-10-06: 262 OI2026-10-07: 262 OI2026-10-08: 262 OI2026-10-09: 278 OI2026-10-13: 337 OI2026-10-14: 337 OI2026-10-15: 1,069 OI2026-10-16: 1,134 OI2026-10-21: 1,233 OI2026-10-23: 1,339 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, 2026Viewing1,339+106
Oct 21, 20261,233+99
Oct 16, 20261,134+65
Oct 15, 20261,069+732
Oct 14, 20263370
Oct 13, 2026337+59
Oct 09, 2026278+16
Oct 08, 20262620
Oct 07, 20262620
Oct 06, 20262620
Oct 05, 20262620
Oct 02, 2026262No prior observation