OITracker Cboe delayed data

Contract OI history

Back to BCS

Dec 18, 2026 EXPIRATION

BCS $23.00 Put

BCS261218P00023000

Latest saved OI1,377Oct 23, 2026
Last change-1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BCS $23.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 1,3786890 2026-10-02: 1,362 OI2026-10-05: 1,369 OI2026-10-06: 1,376 OI2026-10-07: 1,376 OI2026-10-08: 1,376 OI2026-10-09: 1,364 OI2026-10-13: 1,371 OI2026-10-14: 1,375 OI2026-10-15: 1,375 OI2026-10-16: 1,375 OI2026-10-21: 1,378 OI2026-10-23: 1,377 OI Oct 02, 2026Oct 23, 2026

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

BCS contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1,377-1
Oct 21, 20261,378+3
Oct 16, 20261,3750
Oct 15, 20261,3750
Oct 14, 20261,375+4
Oct 13, 20261,371+7
Oct 09, 20261,364-12
Oct 08, 20261,3760
Oct 07, 20261,3760
Oct 06, 20261,376+7
Oct 05, 20261,369+7
Oct 02, 20261,362No prior observation