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Contract OI history

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Nov 20, 2026 EXPIRATION

BLCO $18.00 Call

BLCO261120C00018000

Latest saved OI366Oct 23, 2026
Last change+53vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLCO $18.00 call open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 3661830 2026-10-02: 255 OI2026-10-05: 269 OI2026-10-06: 269 OI2026-10-07: 269 OI2026-10-08: 281 OI2026-10-09: 281 OI2026-10-13: 284 OI2026-10-14: 284 OI2026-10-16: 284 OI2026-10-20: 313 OI2026-10-23: 366 OI Oct 02, 2026Oct 23, 2026

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

BLCO contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing366+53
Oct 20, 2026313+29
Oct 16, 20262840
Oct 14, 20262840
Oct 13, 2026284+3
Oct 09, 20262810
Oct 08, 2026281+12
Oct 07, 20262690
Oct 06, 20262690
Oct 05, 2026269+14
Oct 02, 2026255No prior observation