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Contract OI history

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Nov 20, 2026 EXPIRATION

PFE $21.00 Put

PFE261120P00021000

Latest saved OI907Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $21.00 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. 9204600 2026-10-02: 920 OI2026-10-05: 920 OI2026-10-06: 920 OI2026-10-07: 920 OI2026-10-08: 920 OI2026-10-09: 920 OI2026-10-13: 910 OI2026-10-14: 910 OI2026-10-15: 910 OI2026-10-16: 907 OI2026-10-21: 907 OI2026-10-23: 907 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, 2026Viewing9070
Oct 21, 20269070
Oct 16, 2026907-3
Oct 15, 20269100
Oct 14, 20269100
Oct 13, 2026910-10
Oct 09, 20269200
Oct 08, 20269200
Oct 07, 20269200
Oct 06, 20269200
Oct 05, 20269200
Oct 02, 2026920No prior observation