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Contract OI history

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Dec 18, 2026 EXPIRATION

BSX $55.00 Call

BSX261218C00055000

Latest saved OI5,934Oct 23, 2026
Last change-51vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $55.00 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. 5,9852,9920 2026-10-02: 5,746 OI2026-10-05: 5,818 OI2026-10-06: 5,850 OI2026-10-07: 5,843 OI2026-10-08: 5,843 OI2026-10-09: 5,845 OI2026-10-13: 5,859 OI2026-10-14: 5,859 OI2026-10-15: 5,859 OI2026-10-16: 5,864 OI2026-10-21: 5,985 OI2026-10-23: 5,934 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, 2026Viewing5,934-51
Oct 21, 20265,985+121
Oct 16, 20265,864+5
Oct 15, 20265,8590
Oct 14, 20265,8590
Oct 13, 20265,859+14
Oct 09, 20265,845+2
Oct 08, 20265,8430
Oct 07, 20265,843-7
Oct 06, 20265,850+32
Oct 05, 20265,818+72
Oct 02, 20265,746No prior observation