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Contract OI history

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Oct 30, 2026 EXPIRATION

PFE $26.50 Put

PFE261030P00026500

Latest saved OI721Oct 23, 2026
Last change-10vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $26.50 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. 7633810 2026-10-02: 221 OI2026-10-05: 387 OI2026-10-06: 514 OI2026-10-07: 705 OI2026-10-08: 705 OI2026-10-09: 739 OI2026-10-13: 763 OI2026-10-14: 763 OI2026-10-15: 761 OI2026-10-16: 753 OI2026-10-21: 731 OI2026-10-23: 721 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, 2026Viewing721-10
Oct 21, 2026731-22
Oct 16, 2026753-8
Oct 15, 2026761-2
Oct 14, 20267630
Oct 13, 2026763+24
Oct 09, 2026739+34
Oct 08, 20267050
Oct 07, 2026705+191
Oct 06, 2026514+127
Oct 05, 2026387+166
Oct 02, 2026221No prior observation