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Contract OI history

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Jan 15, 2027 EXPIRATION

CORT $135.00 Put

CORT270115P00135000

Latest saved OI15Oct 23, 2026
Last change+3vs previous saved observation
Saved market days7Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
CORT $135.00 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. 1570 2026-10-08: 13 OI2026-10-09: 13 OI2026-10-13: 15 OI2026-10-14: 15 OI2026-10-16: 15 OI2026-10-20: 12 OI2026-10-23: 15 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, 2026Viewing15+3
Oct 20, 202612-3
Oct 16, 2026150
Oct 14, 2026150
Oct 13, 202615+2
Oct 09, 2026130
Oct 08, 202613No prior observation