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Contract OI history

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Mar 19, 2027 EXPIRATION

PFE $28.00 Put

PFE270319P00028000

Latest saved OI5,012Oct 23, 2026
Last change+102vs 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. 5,0122,5060 2026-10-02: 4,744 OI2026-10-05: 4,740 OI2026-10-06: 4,739 OI2026-10-07: 4,746 OI2026-10-08: 4,746 OI2026-10-09: 4,746 OI2026-10-13: 4,765 OI2026-10-14: 4,765 OI2026-10-15: 4,775 OI2026-10-16: 4,782 OI2026-10-21: 4,910 OI2026-10-23: 5,012 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, 2026Viewing5,012+102
Oct 21, 20264,910+128
Oct 16, 20264,782+7
Oct 15, 20264,775+10
Oct 14, 20264,7650
Oct 13, 20264,765+19
Oct 09, 20264,7460
Oct 08, 20264,7460
Oct 07, 20264,746+7
Oct 06, 20264,739-1
Oct 05, 20264,740-4
Oct 02, 20264,744No prior observation