OITracker Cboe delayed data

Contract OI history

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Nov 06, 2026 EXPIRATION

BSX $41.50 Put

BSX261106P00041500

Latest saved OI1,000Oct 23, 2026
Last change+1,000vs previous saved observation
Saved market days2Oct 21, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $41.50 put open interest history 2 saved observations from 2026-10-21 to 2026-10-23. Exact values and changes are listed in the table below. 1,0005000 2026-10-21: 0 OI2026-10-23: 1,000 OI Oct 21, 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, 2026Viewing1,000+1,000
Oct 21, 20260No prior observation