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Contract OI history

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Jun 17, 2027 EXPIRATION

CTAS $210.00 Put

CTAS270617P00210000

Latest saved OI415Oct 23, 2026
Last change+5vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CTAS $210.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 4152070 2026-10-09: 410 OI2026-10-13: 410 OI2026-10-14: 410 OI2026-10-15: 410 OI2026-10-16: 410 OI2026-10-21: 410 OI2026-10-23: 415 OI Oct 09, 2026Oct 23, 2026

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

CTAS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing415+5
Oct 21, 20264100
Oct 16, 20264100
Oct 15, 20264100
Oct 14, 20264100
Oct 13, 20264100
Oct 09, 2026410No prior observation