OITracker Cboe delayed data

Contract OI history

Back to BLCO

Nov 20, 2026 EXPIRATION

BLCO $19.00 Call

BLCO261120C00019000

Latest saved OI138Oct 23, 2026
Last change-80vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLCO $19.00 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. 2311150 2026-10-02: 221 OI2026-10-05: 222 OI2026-10-06: 222 OI2026-10-07: 224 OI2026-10-08: 225 OI2026-10-09: 225 OI2026-10-13: 231 OI2026-10-14: 231 OI2026-10-16: 231 OI2026-10-20: 218 OI2026-10-23: 138 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, 2026Viewing138-80
Oct 20, 2026218-13
Oct 16, 20262310
Oct 14, 20262310
Oct 13, 2026231+6
Oct 09, 20262250
Oct 08, 2026225+1
Oct 07, 2026224+2
Oct 06, 20262220
Oct 05, 2026222+1
Oct 02, 2026221No prior observation