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Contract OI history

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Nov 20, 2026 EXPIRATION

CTAS $240.00 Call

CTAS261120C00240000

Latest saved OI274Oct 23, 2026
Last change+6vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CTAS $240.00 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. 2741370 2026-10-09: 265 OI2026-10-13: 265 OI2026-10-14: 265 OI2026-10-15: 265 OI2026-10-16: 265 OI2026-10-21: 268 OI2026-10-23: 274 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, 2026Viewing274+6
Oct 21, 2026268+3
Oct 16, 20262650
Oct 15, 20262650
Oct 14, 20262650
Oct 13, 20262650
Oct 09, 2026265No prior observation