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Contract OI history

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Dec 18, 2026 EXPIRATION

CAT $840.00 Put

CAT261218P00840000

Latest saved OI265Oct 23, 2026
Last change-1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CAT $840.00 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. 2741370 2026-10-02: 260 OI2026-10-05: 263 OI2026-10-06: 274 OI2026-10-07: 270 OI2026-10-08: 270 OI2026-10-09: 264 OI2026-10-13: 264 OI2026-10-14: 264 OI2026-10-15: 264 OI2026-10-16: 265 OI2026-10-21: 266 OI2026-10-23: 265 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, 2026Viewing265-1
Oct 21, 2026266+1
Oct 16, 2026265+1
Oct 15, 20262640
Oct 14, 20262640
Oct 13, 20262640
Oct 09, 2026264-6
Oct 08, 20262700
Oct 07, 2026270-4
Oct 06, 2026274+11
Oct 05, 2026263+3
Oct 02, 2026260No prior observation