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Contract OI history

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Jan 21, 2028 EXPIRATION

CAT $550.00 Put

CAT280121P00550000

Latest saved OI327Oct 23, 2026
Last change0vs 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. 3271630 2026-10-02: 321 OI2026-10-05: 321 OI2026-10-06: 321 OI2026-10-07: 321 OI2026-10-08: 321 OI2026-10-09: 326 OI2026-10-13: 326 OI2026-10-14: 326 OI2026-10-15: 326 OI2026-10-16: 327 OI2026-10-21: 327 OI2026-10-23: 327 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, 2026Viewing3270
Oct 21, 20263270
Oct 16, 2026327+1
Oct 15, 20263260
Oct 14, 20263260
Oct 13, 20263260
Oct 09, 2026326+5
Oct 08, 20263210
Oct 07, 20263210
Oct 06, 20263210
Oct 05, 20263210
Oct 02, 2026321No prior observation