OITracker Cboe delayed data

Contract OI history

Back to CTAS

Dec 18, 2026 EXPIRATION

CTAS $230.00 Call

CTAS261218C00230000

Latest saved OI701Oct 23, 2026
Last change+7vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CTAS $230.00 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. 7013500 2026-10-09: 289 OI2026-10-13: 326 OI2026-10-14: 326 OI2026-10-15: 330 OI2026-10-16: 331 OI2026-10-21: 694 OI2026-10-23: 701 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, 2026Viewing701+7
Oct 21, 2026694+363
Oct 16, 2026331+1
Oct 15, 2026330+4
Oct 14, 20263260
Oct 13, 2026326+37
Oct 09, 2026289No prior observation