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Contract OI history

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Nov 20, 2026 EXPIRATION

CTAS $190.00 Put

CTAS261120P00190000

Latest saved OI115Oct 23, 2026
Last change-8vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CTAS $190.00 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. 134670 2026-10-09: 134 OI2026-10-13: 125 OI2026-10-14: 125 OI2026-10-15: 125 OI2026-10-16: 125 OI2026-10-21: 123 OI2026-10-23: 115 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, 2026Viewing115-8
Oct 21, 2026123-2
Oct 16, 20261250
Oct 15, 20261250
Oct 14, 20261250
Oct 13, 2026125-9
Oct 09, 2026134No prior observation