OITracker Cboe delayed data

Contract OI history

Back to PFE

Nov 27, 2026 EXPIRATION

PFE $28.00 Put

PFE261127P00028000

Latest saved OI274Oct 23, 2026
Last change+36vs previous saved observation
Saved market days9Oct 07, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $28.00 put open interest history 9 saved observations from 2026-10-07 to 2026-10-23. Exact values and changes are listed in the table below. 2741370 2026-10-07: 0 OI2026-10-08: 0 OI2026-10-09: 2 OI2026-10-13: 19 OI2026-10-14: 19 OI2026-10-15: 26 OI2026-10-16: 35 OI2026-10-21: 238 OI2026-10-23: 274 OI Oct 07, 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, 2026Viewing274+36
Oct 21, 2026238+203
Oct 16, 202635+9
Oct 15, 202626+7
Oct 14, 2026190
Oct 13, 202619+17
Oct 09, 20262+2
Oct 08, 202600
Oct 07, 20260No prior observation