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Contract OI history

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Dec 17, 2027 EXPIRATION

CAT $400.00 Put

CAT271217P00400000

Latest saved OI920Oct 23, 2026
Last change+63vs 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. 9204600 2026-10-02: 496 OI2026-10-05: 562 OI2026-10-06: 597 OI2026-10-07: 596 OI2026-10-08: 596 OI2026-10-09: 594 OI2026-10-13: 590 OI2026-10-14: 590 OI2026-10-15: 588 OI2026-10-16: 716 OI2026-10-21: 857 OI2026-10-23: 920 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, 2026Viewing920+63
Oct 21, 2026857+141
Oct 16, 2026716+128
Oct 15, 2026588-2
Oct 14, 20265900
Oct 13, 2026590-4
Oct 09, 2026594-2
Oct 08, 20265960
Oct 07, 2026596-1
Oct 06, 2026597+35
Oct 05, 2026562+66
Oct 02, 2026496No prior observation