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Contract OI history

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Dec 18, 2026 EXPIRATION

PFE $28.00 Put

PFE261218P00028000

Latest saved OI5,029Oct 23, 2026
Last change+189vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $28.00 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. 5,0292,5140 2026-10-02: 3,170 OI2026-10-05: 3,356 OI2026-10-06: 4,217 OI2026-10-07: 4,275 OI2026-10-08: 4,275 OI2026-10-09: 4,321 OI2026-10-13: 4,352 OI2026-10-14: 4,352 OI2026-10-15: 4,265 OI2026-10-16: 4,534 OI2026-10-21: 4,840 OI2026-10-23: 5,029 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, 2026Viewing5,029+189
Oct 21, 20264,840+306
Oct 16, 20264,534+269
Oct 15, 20264,265-87
Oct 14, 20264,3520
Oct 13, 20264,352+31
Oct 09, 20264,321+46
Oct 08, 20264,2750
Oct 07, 20264,275+58
Oct 06, 20264,217+861
Oct 05, 20263,356+186
Oct 02, 20263,170No prior observation