OITracker Cboe delayed data

Contract OI history

Back to CTAS

Nov 20, 2026 EXPIRATION

CTAS $180.00 Put

CTAS261120P00180000

Latest saved OI1,358Oct 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 $180.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 1,3656820 2026-10-09: 1,360 OI2026-10-13: 1,365 OI2026-10-14: 1,365 OI2026-10-15: 1,365 OI2026-10-16: 1,364 OI2026-10-21: 1,358 OI2026-10-23: 1,358 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, 2026Viewing1,3580
Oct 21, 20261,358-6
Oct 16, 20261,364-1
Oct 15, 20261,3650
Oct 14, 20261,3650
Oct 13, 20261,365+5
Oct 09, 20261,360No prior observation