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Contract OI history

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Oct 23, 2026 EXPIRATION

PFE $25.50 Put

PFE261023P00025500

Latest saved OI131Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $25.50 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. 131650 2026-10-02: 105 OI2026-10-05: 105 OI2026-10-06: 118 OI2026-10-07: 128 OI2026-10-08: 128 OI2026-10-09: 130 OI2026-10-13: 130 OI2026-10-14: 130 OI2026-10-15: 130 OI2026-10-16: 130 OI2026-10-21: 130 OI2026-10-23: 131 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, 2026Viewing131+1
Oct 21, 20261300
Oct 16, 20261300
Oct 15, 20261300
Oct 14, 20261300
Oct 13, 20261300
Oct 09, 2026130+2
Oct 08, 20261280
Oct 07, 2026128+10
Oct 06, 2026118+13
Oct 05, 20261050
Oct 02, 2026105No prior observation