OITracker Cboe delayed data

Contract OI history

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Oct 30, 2026 EXPIRATION

PFE $28.50 Put

PFE261030P00028500

Latest saved OI2,433Oct 23, 2026
Last change+1,924vs 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. 2,4331,2160 2026-10-02: 479 OI2026-10-05: 497 OI2026-10-06: 447 OI2026-10-07: 447 OI2026-10-08: 447 OI2026-10-09: 449 OI2026-10-13: 460 OI2026-10-14: 460 OI2026-10-15: 481 OI2026-10-16: 475 OI2026-10-21: 509 OI2026-10-23: 2,433 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, 2026Viewing2,433+1,924
Oct 21, 2026509+34
Oct 16, 2026475-6
Oct 15, 2026481+21
Oct 14, 20264600
Oct 13, 2026460+11
Oct 09, 2026449+2
Oct 08, 20264470
Oct 07, 20264470
Oct 06, 2026447-50
Oct 05, 2026497+18
Oct 02, 2026479No prior observation