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Contract OI history

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Jan 15, 2027 EXPIRATION

BSX $35.00 Put

BSX270115P00035000

Latest saved OI4,078Oct 23, 2026
Last change+4vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $35.00 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. 4,0782,0390 2026-10-02: 3,818 OI2026-10-05: 3,835 OI2026-10-06: 4,030 OI2026-10-07: 4,033 OI2026-10-08: 4,033 OI2026-10-09: 4,063 OI2026-10-13: 4,063 OI2026-10-14: 4,063 OI2026-10-15: 4,067 OI2026-10-16: 4,067 OI2026-10-21: 4,074 OI2026-10-23: 4,078 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, 2026Viewing4,078+4
Oct 21, 20264,074+7
Oct 16, 20264,0670
Oct 15, 20264,067+4
Oct 14, 20264,0630
Oct 13, 20264,0630
Oct 09, 20264,063+30
Oct 08, 20264,0330
Oct 07, 20264,033+3
Oct 06, 20264,030+195
Oct 05, 20263,835+17
Oct 02, 20263,818No prior observation