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Contract OI history

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Dec 18, 2026 EXPIRATION

CAT $500.00 Put

CAT261218P00500000

Latest saved OI532Oct 23, 2026
Last change+4vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CAT $500.00 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. 5342670 2026-10-02: 513 OI2026-10-05: 513 OI2026-10-06: 513 OI2026-10-07: 513 OI2026-10-08: 513 OI2026-10-09: 513 OI2026-10-13: 513 OI2026-10-14: 513 OI2026-10-15: 534 OI2026-10-16: 526 OI2026-10-21: 528 OI2026-10-23: 532 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, 2026Viewing532+4
Oct 21, 2026528+2
Oct 16, 2026526-8
Oct 15, 2026534+21
Oct 14, 20265130
Oct 13, 20265130
Oct 09, 20265130
Oct 08, 20265130
Oct 07, 20265130
Oct 06, 20265130
Oct 05, 20265130
Oct 02, 2026513No prior observation