OITracker Cboe delayed data

Contract OI history

Back to CAT

Jan 21, 2028 EXPIRATION

CAT $400.00 Put

CAT280121P00400000

Latest saved OI913Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CAT $400.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 9134560 2026-10-02: 909 OI2026-10-05: 909 OI2026-10-06: 909 OI2026-10-07: 909 OI2026-10-08: 909 OI2026-10-09: 909 OI2026-10-13: 910 OI2026-10-14: 910 OI2026-10-15: 910 OI2026-10-16: 910 OI2026-10-21: 913 OI2026-10-23: 913 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

CAT contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing9130
Oct 21, 2026913+3
Oct 16, 20269100
Oct 15, 20269100
Oct 14, 20269100
Oct 13, 2026910+1
Oct 09, 20269090
Oct 08, 20269090
Oct 07, 20269090
Oct 06, 20269090
Oct 05, 20269090
Oct 02, 2026909No prior observation