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Contract OI history

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Jan 21, 2028 EXPIRATION

PFE $18.00 Put

PFE280121P00018000

Latest saved OI6,323Oct 23, 2026
Last change-10vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $18.00 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. 6,3633,1810 2026-10-02: 6,363 OI2026-10-05: 6,363 OI2026-10-06: 6,363 OI2026-10-07: 6,363 OI2026-10-08: 6,363 OI2026-10-09: 6,363 OI2026-10-13: 6,363 OI2026-10-14: 6,363 OI2026-10-15: 6,363 OI2026-10-16: 6,363 OI2026-10-21: 6,333 OI2026-10-23: 6,323 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, 2026Viewing6,323-10
Oct 21, 20266,333-30
Oct 16, 20266,3630
Oct 15, 20266,3630
Oct 14, 20266,3630
Oct 13, 20266,3630
Oct 09, 20266,3630
Oct 08, 20266,3630
Oct 07, 20266,3630
Oct 06, 20266,3630
Oct 05, 20266,3630
Oct 02, 20266,363No prior observation