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Contract OI history

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Oct 23, 2026 EXPIRATION

PFE $27.50 Put

PFE261023P00027500

Latest saved OI1,976Oct 23, 2026
Last change-3vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $27.50 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. 1,9909950 2026-10-02: 508 OI2026-10-05: 540 OI2026-10-06: 538 OI2026-10-07: 588 OI2026-10-08: 588 OI2026-10-09: 995 OI2026-10-13: 1,335 OI2026-10-14: 1,335 OI2026-10-15: 1,360 OI2026-10-16: 1,990 OI2026-10-21: 1,979 OI2026-10-23: 1,976 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, 2026Viewing1,976-3
Oct 21, 20261,979-11
Oct 16, 20261,990+630
Oct 15, 20261,360+25
Oct 14, 20261,3350
Oct 13, 20261,335+340
Oct 09, 2026995+407
Oct 08, 20265880
Oct 07, 2026588+50
Oct 06, 2026538-2
Oct 05, 2026540+32
Oct 02, 2026508No prior observation