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Contract OI history

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Nov 20, 2026 EXPIRATION

BLCO $16.00 Put

BLCO261120P00016000

Latest saved OI140Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BLCO $16.00 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. 140700 2026-10-02: 35 OI2026-10-05: 35 OI2026-10-06: 35 OI2026-10-07: 35 OI2026-10-08: 35 OI2026-10-09: 35 OI2026-10-13: 128 OI2026-10-14: 140 OI2026-10-16: 140 OI2026-10-20: 140 OI2026-10-23: 140 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, 2026Viewing1400
Oct 20, 20261400
Oct 16, 20261400
Oct 14, 2026140+12
Oct 13, 2026128+93
Oct 09, 2026350
Oct 08, 2026350
Oct 07, 2026350
Oct 06, 2026350
Oct 05, 2026350
Oct 02, 202635No prior observation