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Contract OI history

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Dec 18, 2026 EXPIRATION

BSX $42.50 Call

BSX261218C00042500

Latest saved OI651Oct 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 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 6543270 2026-10-02: 233 OI2026-10-05: 234 OI2026-10-06: 233 OI2026-10-07: 384 OI2026-10-08: 384 OI2026-10-09: 609 OI2026-10-13: 637 OI2026-10-14: 637 OI2026-10-15: 638 OI2026-10-16: 642 OI2026-10-21: 654 OI2026-10-23: 651 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, 2026Viewing651-3
Oct 21, 2026654+12
Oct 16, 2026642+4
Oct 15, 2026638+1
Oct 14, 20266370
Oct 13, 2026637+28
Oct 09, 2026609+225
Oct 08, 20263840
Oct 07, 2026384+151
Oct 06, 2026233-1
Oct 05, 2026234+1
Oct 02, 2026233No prior observation