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Contract OI history

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Dec 18, 2026 EXPIRATION

CAT $550.00 Put

CAT261218P00550000

Latest saved OI298Oct 23, 2026
Last change+2vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CAT $550.00 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. 2981490 2026-10-02: 261 OI2026-10-05: 261 OI2026-10-06: 255 OI2026-10-07: 252 OI2026-10-08: 252 OI2026-10-09: 278 OI2026-10-13: 276 OI2026-10-14: 276 OI2026-10-15: 275 OI2026-10-16: 270 OI2026-10-21: 296 OI2026-10-23: 298 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, 2026Viewing298+2
Oct 21, 2026296+26
Oct 16, 2026270-5
Oct 15, 2026275-1
Oct 14, 20262760
Oct 13, 2026276-2
Oct 09, 2026278+26
Oct 08, 20262520
Oct 07, 2026252-3
Oct 06, 2026255-6
Oct 05, 20262610
Oct 02, 2026261No prior observation