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Contract OI history

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Nov 20, 2026 EXPIRATION

CTAS $210.00 Call

CTAS261120C00210000

Latest saved OI642Oct 23, 2026
Last change-18vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CTAS $210.00 call open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 6603300 2026-10-09: 373 OI2026-10-13: 409 OI2026-10-14: 409 OI2026-10-15: 413 OI2026-10-16: 409 OI2026-10-21: 660 OI2026-10-23: 642 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, 2026Viewing642-18
Oct 21, 2026660+251
Oct 16, 2026409-4
Oct 15, 2026413+4
Oct 14, 20264090
Oct 13, 2026409+36
Oct 09, 2026373No prior observation