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Contract OI history

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Oct 23, 2026 EXPIRATION

BSX $42.50 Put

BSX261023P00042500

Latest saved OI453Oct 23, 2026
Last change+3vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $42.50 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. 1,2046020 2026-10-02: 0 OI2026-10-05: 0 OI2026-10-06: 0 OI2026-10-07: 1 OI2026-10-08: 1 OI2026-10-09: 12 OI2026-10-13: 227 OI2026-10-14: 227 OI2026-10-15: 1,204 OI2026-10-16: 1,204 OI2026-10-21: 450 OI2026-10-23: 453 OI Oct 02, 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, 2026Viewing453+3
Oct 21, 2026450-754
Oct 16, 20261,2040
Oct 15, 20261,204+977
Oct 14, 20262270
Oct 13, 2026227+215
Oct 09, 202612+11
Oct 08, 202610
Oct 07, 20261+1
Oct 06, 202600
Oct 05, 202600
Oct 02, 20260No prior observation