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Contract OI history

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Dec 18, 2026 EXPIRATION

COLB $30.00 Call

COLB261218C00030000

Latest saved OI217Oct 23, 2026
Last change+205vs previous saved observation
Saved market days4Oct 15, 2026 onwards
Daily open interest Hover a point for its date and OI
COLB $30.00 call open interest history 4 saved observations from 2026-10-15 to 2026-10-23. Exact values and changes are listed in the table below. 2171080 2026-10-15: 0 OI2026-10-16: 1 OI2026-10-21: 12 OI2026-10-23: 217 OI Oct 15, 2026Oct 23, 2026

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

COLB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing217+205
Oct 21, 202612+11
Oct 16, 20261+1
Oct 15, 20260No prior observation