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Contract OI history

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Mar 19, 2027 EXPIRATION

CAT $500.00 Put

CAT270319P00500000

Latest saved OI178Oct 23, 2026
Last change-12vs 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. 192960 2026-10-02: 169 OI2026-10-05: 169 OI2026-10-06: 182 OI2026-10-07: 182 OI2026-10-08: 182 OI2026-10-09: 182 OI2026-10-13: 192 OI2026-10-14: 192 OI2026-10-15: 192 OI2026-10-16: 190 OI2026-10-21: 190 OI2026-10-23: 178 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, 2026Viewing178-12
Oct 21, 20261900
Oct 16, 2026190-2
Oct 15, 20261920
Oct 14, 20261920
Oct 13, 2026192+10
Oct 09, 20261820
Oct 08, 20261820
Oct 07, 20261820
Oct 06, 2026182+13
Oct 05, 20261690
Oct 02, 2026169No prior observation