OITracker Cboe delayed data

Contract OI history

Back to PFE

Jun 17, 2027 EXPIRATION

PFE $28.00 Put

PFE270617P00028000

Latest saved OI40Oct 23, 2026
Last change+9vs previous saved observation
Saved market days4Oct 15, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $28.00 put open interest history 4 saved observations from 2026-10-15 to 2026-10-23. Exact values and changes are listed in the table below. 40200 2026-10-15: 0 OI2026-10-16: 9 OI2026-10-21: 31 OI2026-10-23: 40 OI Oct 15, 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, 2026Viewing40+9
Oct 21, 202631+22
Oct 16, 20269+9
Oct 15, 20260No prior observation