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Contract OI history

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Nov 06, 2026 EXPIRATION

PFE $26.50 Put

PFE261106P00026500

Latest saved OI488Oct 23, 2026
Last change+276vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PFE $26.50 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. 4882440 2026-10-02: 23 OI2026-10-05: 56 OI2026-10-06: 115 OI2026-10-07: 119 OI2026-10-08: 119 OI2026-10-09: 147 OI2026-10-13: 251 OI2026-10-14: 251 OI2026-10-15: 205 OI2026-10-16: 204 OI2026-10-21: 212 OI2026-10-23: 488 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, 2026Viewing488+276
Oct 21, 2026212+8
Oct 16, 2026204-1
Oct 15, 2026205-46
Oct 14, 20262510
Oct 13, 2026251+104
Oct 09, 2026147+28
Oct 08, 20261190
Oct 07, 2026119+4
Oct 06, 2026115+59
Oct 05, 202656+33
Oct 02, 202623No prior observation