OITracker Cboe delayed data

Contract OI history

Back to CTAS

Nov 20, 2026 EXPIRATION

CTAS $280.00 Call

CTAS261120C00280000

Latest saved OI221Oct 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 $280.00 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. 2211100 2026-10-09: 221 OI2026-10-13: 221 OI2026-10-14: 221 OI2026-10-15: 221 OI2026-10-16: 221 OI2026-10-21: 221 OI2026-10-23: 221 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, 2026Viewing2210
Oct 21, 20262210
Oct 16, 20262210
Oct 15, 20262210
Oct 14, 20262210
Oct 13, 20262210
Oct 09, 2026221No prior observation