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Contract OI history

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Nov 06, 2026 EXPIRATION

PFE $28.50 Put

PFE261106P00028500

Latest saved OI547Oct 23, 2026
Last change+57vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $28.50 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. 5472730 2026-10-02: 52 OI2026-10-05: 254 OI2026-10-06: 353 OI2026-10-07: 357 OI2026-10-08: 357 OI2026-10-09: 360 OI2026-10-13: 349 OI2026-10-14: 349 OI2026-10-15: 358 OI2026-10-16: 396 OI2026-10-21: 490 OI2026-10-23: 547 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, 2026Viewing547+57
Oct 21, 2026490+94
Oct 16, 2026396+38
Oct 15, 2026358+9
Oct 14, 20263490
Oct 13, 2026349-11
Oct 09, 2026360+3
Oct 08, 20263570
Oct 07, 2026357+4
Oct 06, 2026353+99
Oct 05, 2026254+202
Oct 02, 202652No prior observation