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Contract OI history

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Dec 15, 2028 EXPIRATION

PFE $18.00 Put

PFE281215P00018000

Latest saved OI378Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $18.00 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. 3781890 2026-10-02: 377 OI2026-10-05: 377 OI2026-10-06: 377 OI2026-10-07: 377 OI2026-10-08: 377 OI2026-10-09: 377 OI2026-10-13: 377 OI2026-10-14: 377 OI2026-10-15: 377 OI2026-10-16: 378 OI2026-10-21: 378 OI2026-10-23: 378 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, 2026Viewing3780
Oct 21, 20263780
Oct 16, 2026378+1
Oct 15, 20263770
Oct 14, 20263770
Oct 13, 20263770
Oct 09, 20263770
Oct 08, 20263770
Oct 07, 20263770
Oct 06, 20263770
Oct 05, 20263770
Oct 02, 2026377No prior observation