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Contract OI history

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Oct 30, 2026 EXPIRATION

PFE $28.00 Put

PFE261030P00028000

Latest saved OI1,546Oct 23, 2026
Last change+539vs 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. 1,5467730 2026-10-02: 740 OI2026-10-05: 802 OI2026-10-06: 816 OI2026-10-07: 871 OI2026-10-08: 871 OI2026-10-09: 952 OI2026-10-13: 1,071 OI2026-10-14: 1,071 OI2026-10-15: 1,066 OI2026-10-16: 1,083 OI2026-10-21: 1,007 OI2026-10-23: 1,546 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, 2026Viewing1,546+539
Oct 21, 20261,007-76
Oct 16, 20261,083+17
Oct 15, 20261,066-5
Oct 14, 20261,0710
Oct 13, 20261,071+119
Oct 09, 2026952+81
Oct 08, 20268710
Oct 07, 2026871+55
Oct 06, 2026816+14
Oct 05, 2026802+62
Oct 02, 2026740No prior observation