OITracker Cboe delayed data

Contract OI history

Back to BSX

Oct 30, 2026 EXPIRATION

BSX $43.50 Call

BSX261030C00043500

Latest saved OI200Oct 23, 2026
Last change+102vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $43.50 call open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 2001000 2026-10-09: 0 OI2026-10-13: 24 OI2026-10-14: 24 OI2026-10-15: 96 OI2026-10-16: 96 OI2026-10-21: 98 OI2026-10-23: 200 OI Oct 09, 2026Oct 23, 2026

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

BSX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing200+102
Oct 21, 202698+2
Oct 16, 2026960
Oct 15, 202696+72
Oct 14, 2026240
Oct 13, 202624+24
Oct 09, 20260No prior observation