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Contract OI history

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Jan 21, 2028 EXPIRATION

BSX $35.00 Put

BSX280121P00035000

Latest saved OI8,251Oct 23, 2026
Last change+2vs 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. 8,2514,1250 2026-10-02: 8,129 OI2026-10-05: 8,130 OI2026-10-06: 8,131 OI2026-10-07: 8,135 OI2026-10-08: 8,135 OI2026-10-09: 8,135 OI2026-10-13: 8,137 OI2026-10-14: 8,137 OI2026-10-15: 8,149 OI2026-10-16: 8,149 OI2026-10-21: 8,249 OI2026-10-23: 8,251 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, 2026Viewing8,251+2
Oct 21, 20268,249+100
Oct 16, 20268,1490
Oct 15, 20268,149+12
Oct 14, 20268,1370
Oct 13, 20268,137+2
Oct 09, 20268,1350
Oct 08, 20268,1350
Oct 07, 20268,135+4
Oct 06, 20268,131+1
Oct 05, 20268,130+1
Oct 02, 20268,129No prior observation