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Contract OI history

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Dec 18, 2026 EXPIRATION

PFE $18.00 Put

PFE261218P00018000

Latest saved OI7,726Oct 23, 2026
Last change-2vs 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. 8,8284,4140 2026-10-02: 8,828 OI2026-10-05: 8,828 OI2026-10-06: 8,828 OI2026-10-07: 8,728 OI2026-10-08: 8,728 OI2026-10-09: 8,728 OI2026-10-13: 8,728 OI2026-10-14: 8,728 OI2026-10-15: 8,728 OI2026-10-16: 8,728 OI2026-10-21: 7,728 OI2026-10-23: 7,726 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, 2026Viewing7,726-2
Oct 21, 20267,728-1,000
Oct 16, 20268,7280
Oct 15, 20268,7280
Oct 14, 20268,7280
Oct 13, 20268,7280
Oct 09, 20268,7280
Oct 08, 20268,7280
Oct 07, 20268,728-100
Oct 06, 20268,8280
Oct 05, 20268,8280
Oct 02, 20268,828No prior observation