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Contract OI history

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Nov 20, 2026 EXPIRATION

BSX $45.50 Put

BSX261120P00045500

Latest saved OI151Oct 23, 2026
Last change+28vs previous saved observation
Saved market days2Oct 21, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $45.50 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. 151750 2026-10-21: 123 OI2026-10-23: 151 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, 2026Viewing151+28
Oct 21, 2026123No prior observation