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Contract OI history

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Nov 20, 2026 EXPIRATION

PFE $28.00 Put

PFE261120P00028000

Latest saved OI11,022Oct 23, 2026
Last change+335vs 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. 11,0225,5110 2026-10-02: 9,690 OI2026-10-05: 9,641 OI2026-10-06: 9,625 OI2026-10-07: 9,657 OI2026-10-08: 9,657 OI2026-10-09: 9,652 OI2026-10-13: 10,945 OI2026-10-14: 10,945 OI2026-10-15: 10,945 OI2026-10-16: 10,965 OI2026-10-21: 10,687 OI2026-10-23: 11,022 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, 2026Viewing11,022+335
Oct 21, 202610,687-278
Oct 16, 202610,965+20
Oct 15, 202610,9450
Oct 14, 202610,9450
Oct 13, 202610,945+1,293
Oct 09, 20269,652-5
Oct 08, 20269,6570
Oct 07, 20269,657+32
Oct 06, 20269,625-16
Oct 05, 20269,641-49
Oct 02, 20269,690No prior observation