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Contract OI history

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Dec 18, 2026 EXPIRATION

GCO $17.50 Put

GCO261218P00017500

Latest saved OI966Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
GCO $17.50 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 9664830 2026-10-02: 938 OI2026-10-05: 938 OI2026-10-06: 938 OI2026-10-07: 938 OI2026-10-08: 938 OI2026-10-09: 938 OI2026-10-13: 938 OI2026-10-14: 938 OI2026-10-16: 938 OI2026-10-20: 966 OI2026-10-23: 966 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

GCO contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing9660
Oct 20, 2026966+28
Oct 16, 20269380
Oct 14, 20269380
Oct 13, 20269380
Oct 09, 20269380
Oct 08, 20269380
Oct 07, 20269380
Oct 06, 20269380
Oct 05, 20269380
Oct 02, 2026938No prior observation