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Contract OI history

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Dec 18, 2026 EXPIRATION

CORT $85.00 Put

CORT261218P00085000

Latest saved OI27Oct 23, 2026
Last change+7vs previous saved observation
Saved market days4Oct 14, 2026 onwards
Daily open interest Hover a point for its date and OI
CORT $85.00 put open interest history 4 saved observations from 2026-10-14 to 2026-10-23. Exact values and changes are listed in the table below. 27130 2026-10-14: 0 OI2026-10-16: 0 OI2026-10-20: 20 OI2026-10-23: 27 OI Oct 14, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

CORT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing27+7
Oct 20, 202620+20
Oct 16, 202600
Oct 14, 20260No prior observation