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Contract OI history

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Dec 18, 2026 EXPIRATION

GCO $20.00 Put

GCO261218P00020000

Latest saved OI426Oct 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 $20.00 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. 4262130 2026-10-02: 414 OI2026-10-05: 414 OI2026-10-06: 414 OI2026-10-07: 414 OI2026-10-08: 414 OI2026-10-09: 414 OI2026-10-13: 414 OI2026-10-14: 414 OI2026-10-16: 414 OI2026-10-20: 426 OI2026-10-23: 426 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, 2026Viewing4260
Oct 20, 2026426+12
Oct 16, 20264140
Oct 14, 20264140
Oct 13, 20264140
Oct 09, 20264140
Oct 08, 20264140
Oct 07, 20264140
Oct 06, 20264140
Oct 05, 20264140
Oct 02, 2026414No prior observation