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Contract OI history

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Oct 30, 2026 EXPIRATION

PFE $27.50 Put

PFE261030P00027500

Latest saved OI1,477Oct 23, 2026
Last change-49vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $27.50 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. 1,6978480 2026-10-02: 367 OI2026-10-05: 453 OI2026-10-06: 595 OI2026-10-07: 612 OI2026-10-08: 612 OI2026-10-09: 689 OI2026-10-13: 1,202 OI2026-10-14: 1,202 OI2026-10-15: 1,357 OI2026-10-16: 1,697 OI2026-10-21: 1,526 OI2026-10-23: 1,477 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, 2026Viewing1,477-49
Oct 21, 20261,526-171
Oct 16, 20261,697+340
Oct 15, 20261,357+155
Oct 14, 20261,2020
Oct 13, 20261,202+513
Oct 09, 2026689+77
Oct 08, 20266120
Oct 07, 2026612+17
Oct 06, 2026595+142
Oct 05, 2026453+86
Oct 02, 2026367No prior observation