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Contract OI history

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Dec 18, 2026 EXPIRATION

CAT $870.00 Put

CAT261218P00870000

Latest saved OI228Oct 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 $870.00 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. 2281140 2026-10-02: 224 OI2026-10-05: 224 OI2026-10-06: 221 OI2026-10-07: 222 OI2026-10-08: 222 OI2026-10-09: 222 OI2026-10-13: 227 OI2026-10-14: 227 OI2026-10-15: 227 OI2026-10-16: 227 OI2026-10-21: 227 OI2026-10-23: 228 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, 2026Viewing228+1
Oct 21, 20262270
Oct 16, 20262270
Oct 15, 20262270
Oct 14, 20262270
Oct 13, 2026227+5
Oct 09, 20262220
Oct 08, 20262220
Oct 07, 2026222+1
Oct 06, 2026221-3
Oct 05, 20262240
Oct 02, 2026224No prior observation