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Contract OI history

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Dec 18, 2026 EXPIRATION

CTAS $175.00 Call

CTAS261218C00175000

Latest saved OI1,931Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CTAS $175.00 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. 1,9319650 2026-10-09: 1,931 OI2026-10-13: 1,931 OI2026-10-14: 1,931 OI2026-10-15: 1,931 OI2026-10-16: 1,931 OI2026-10-21: 1,931 OI2026-10-23: 1,931 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, 2026Viewing1,9310
Oct 21, 20261,9310
Oct 16, 20261,9310
Oct 15, 20261,9310
Oct 14, 20261,9310
Oct 13, 20261,9310
Oct 09, 20261,931No prior observation