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Contract OI history

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Jan 15, 2027 EXPIRATION

BSX $42.50 Put

BSX270115P00042500

Latest saved OI2,634Oct 23, 2026
Last change+17vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $42.50 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. 2,6341,3170 2026-10-02: 2,430 OI2026-10-05: 2,431 OI2026-10-06: 2,458 OI2026-10-07: 2,458 OI2026-10-08: 2,458 OI2026-10-09: 2,460 OI2026-10-13: 2,469 OI2026-10-14: 2,469 OI2026-10-15: 2,478 OI2026-10-16: 2,554 OI2026-10-21: 2,617 OI2026-10-23: 2,634 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, 2026Viewing2,634+17
Oct 21, 20262,617+63
Oct 16, 20262,554+76
Oct 15, 20262,478+9
Oct 14, 20262,4690
Oct 13, 20262,469+9
Oct 09, 20262,460+2
Oct 08, 20262,4580
Oct 07, 20262,4580
Oct 06, 20262,458+27
Oct 05, 20262,431+1
Oct 02, 20262,430No prior observation