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Contract OI history

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Dec 18, 2026 EXPIRATION

CAT $640.00 Put

CAT261218P00640000

Latest saved OI188Oct 23, 2026
Last change+14vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CAT $640.00 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. 188940 2026-10-02: 76 OI2026-10-05: 75 OI2026-10-06: 112 OI2026-10-07: 117 OI2026-10-08: 117 OI2026-10-09: 130 OI2026-10-13: 132 OI2026-10-14: 132 OI2026-10-15: 132 OI2026-10-16: 143 OI2026-10-21: 174 OI2026-10-23: 188 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, 2026Viewing188+14
Oct 21, 2026174+31
Oct 16, 2026143+11
Oct 15, 20261320
Oct 14, 20261320
Oct 13, 2026132+2
Oct 09, 2026130+13
Oct 08, 20261170
Oct 07, 2026117+5
Oct 06, 2026112+37
Oct 05, 202675-1
Oct 02, 202676No prior observation