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Contract OI history

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Jan 15, 2027 EXPIRATION

CAT $400.00 Put

CAT270115P00400000

Latest saved OI491Oct 23, 2026
Last change-3vs 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. 4942470 2026-10-02: 307 OI2026-10-05: 307 OI2026-10-06: 307 OI2026-10-07: 307 OI2026-10-08: 307 OI2026-10-09: 307 OI2026-10-13: 306 OI2026-10-14: 306 OI2026-10-15: 306 OI2026-10-16: 296 OI2026-10-21: 494 OI2026-10-23: 491 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, 2026Viewing491-3
Oct 21, 2026494+198
Oct 16, 2026296-10
Oct 15, 20263060
Oct 14, 20263060
Oct 13, 2026306-1
Oct 09, 20263070
Oct 08, 20263070
Oct 07, 20263070
Oct 06, 20263070
Oct 05, 20263070
Oct 02, 2026307No prior observation