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Contract OI history

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Mar 19, 2027 EXPIRATION

CAT $640.00 Put

CAT270319P00640000

Latest saved OI407Oct 23, 2026
Last change+5vs 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. 4072030 2026-10-02: 185 OI2026-10-05: 185 OI2026-10-06: 189 OI2026-10-07: 197 OI2026-10-08: 197 OI2026-10-09: 201 OI2026-10-13: 266 OI2026-10-14: 266 OI2026-10-15: 398 OI2026-10-16: 398 OI2026-10-21: 402 OI2026-10-23: 407 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, 2026Viewing407+5
Oct 21, 2026402+4
Oct 16, 20263980
Oct 15, 2026398+132
Oct 14, 20262660
Oct 13, 2026266+65
Oct 09, 2026201+4
Oct 08, 20261970
Oct 07, 2026197+8
Oct 06, 2026189+4
Oct 05, 20261850
Oct 02, 2026185No prior observation