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Contract OI history

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Jan 21, 2028 EXPIRATION

CAT $640.00 Put

CAT280121P00640000

Latest saved OI743Oct 23, 2026
Last change+126vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CAT $640.00 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. 7433710 2026-10-02: 583 OI2026-10-05: 593 OI2026-10-06: 583 OI2026-10-07: 593 OI2026-10-08: 593 OI2026-10-09: 608 OI2026-10-13: 608 OI2026-10-14: 608 OI2026-10-15: 608 OI2026-10-16: 617 OI2026-10-21: 617 OI2026-10-23: 743 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, 2026Viewing743+126
Oct 21, 20266170
Oct 16, 2026617+9
Oct 15, 20266080
Oct 14, 20266080
Oct 13, 20266080
Oct 09, 2026608+15
Oct 08, 20265930
Oct 07, 2026593+10
Oct 06, 2026583-10
Oct 05, 2026593+10
Oct 02, 2026583No prior observation