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Contract OI history

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Jan 21, 2028 EXPIRATION

CORT $70.00 Put

CORT280121P00070000

Latest saved OI400Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
CORT $70.00 put open interest history 7 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 4002000 2026-10-08: 400 OI2026-10-09: 400 OI2026-10-13: 400 OI2026-10-14: 400 OI2026-10-16: 400 OI2026-10-20: 400 OI2026-10-23: 400 OI Oct 08, 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, 2026Viewing4000
Oct 20, 20264000
Oct 16, 20264000
Oct 14, 20264000
Oct 13, 20264000
Oct 09, 20264000
Oct 08, 2026400No prior observation