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Contract OI history

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Dec 17, 2027 EXPIRATION

CAT $500.00 Put

CAT271217P00500000

Latest saved OI479Oct 23, 2026
Last change+253vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CAT $500.00 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. 4792390 2026-10-02: 205 OI2026-10-05: 222 OI2026-10-06: 238 OI2026-10-07: 240 OI2026-10-08: 240 OI2026-10-09: 230 OI2026-10-13: 227 OI2026-10-14: 227 OI2026-10-15: 227 OI2026-10-16: 227 OI2026-10-21: 226 OI2026-10-23: 479 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, 2026Viewing479+253
Oct 21, 2026226-1
Oct 16, 20262270
Oct 15, 20262270
Oct 14, 20262270
Oct 13, 2026227-3
Oct 09, 2026230-10
Oct 08, 20262400
Oct 07, 2026240+2
Oct 06, 2026238+16
Oct 05, 2026222+17
Oct 02, 2026205No prior observation