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Contract OI history

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Dec 18, 2026 EXPIRATION

CG $27.50 Put

CG261218P00027500

Latest saved OI109Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
CG $27.50 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 109540 2026-10-09: 35 OI2026-10-13: 35 OI2026-10-14: 45 OI2026-10-15: 95 OI2026-10-16: 109 OI2026-10-21: 109 OI2026-10-23: 109 OI Oct 09, 2026Oct 23, 2026

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

CG contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1090
Oct 21, 20261090
Oct 16, 2026109+14
Oct 15, 202695+50
Oct 14, 202645+10
Oct 13, 2026350
Oct 09, 202635No prior observation