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Contract OI history

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Feb 19, 2027 EXPIRATION

BSX $40.00 Put

BSX270219P00040000

Latest saved OI6,022Oct 23, 2026
Last change+25vs 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. 6,0223,0110 2026-10-02: 3,835 OI2026-10-05: 3,836 OI2026-10-06: 3,843 OI2026-10-07: 3,840 OI2026-10-08: 3,840 OI2026-10-09: 3,844 OI2026-10-13: 3,843 OI2026-10-14: 3,843 OI2026-10-15: 3,843 OI2026-10-16: 4,186 OI2026-10-21: 5,997 OI2026-10-23: 6,022 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, 2026Viewing6,022+25
Oct 21, 20265,997+1,811
Oct 16, 20264,186+343
Oct 15, 20263,8430
Oct 14, 20263,8430
Oct 13, 20263,843-1
Oct 09, 20263,844+4
Oct 08, 20263,8400
Oct 07, 20263,840-3
Oct 06, 20263,843+7
Oct 05, 20263,836+1
Oct 02, 20263,835No prior observation