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Contract OI history

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Jan 15, 2027 EXPIRATION

BSX $40.00 Put

BSX270115P00040000

Latest saved OI3,743Oct 23, 2026
Last change+23vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $40.00 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. 3,7431,8710 2026-10-02: 3,488 OI2026-10-05: 3,511 OI2026-10-06: 3,587 OI2026-10-07: 3,587 OI2026-10-08: 3,587 OI2026-10-09: 3,608 OI2026-10-13: 3,614 OI2026-10-14: 3,614 OI2026-10-15: 3,625 OI2026-10-16: 3,623 OI2026-10-21: 3,720 OI2026-10-23: 3,743 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, 2026Viewing3,743+23
Oct 21, 20263,720+97
Oct 16, 20263,623-2
Oct 15, 20263,625+11
Oct 14, 20263,6140
Oct 13, 20263,614+6
Oct 09, 20263,608+21
Oct 08, 20263,5870
Oct 07, 20263,5870
Oct 06, 20263,587+76
Oct 05, 20263,511+23
Oct 02, 20263,488No prior observation