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Contract OI history

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Mar 19, 2027 EXPIRATION

BSX $40.00 Call

BSX270319C00040000

Latest saved OI266Oct 23, 2026
Last change+21vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $40.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2661330 2026-10-02: 212 OI2026-10-05: 212 OI2026-10-06: 216 OI2026-10-07: 218 OI2026-10-08: 218 OI2026-10-09: 219 OI2026-10-13: 219 OI2026-10-14: 219 OI2026-10-15: 234 OI2026-10-16: 191 OI2026-10-21: 245 OI2026-10-23: 266 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, 2026Viewing266+21
Oct 21, 2026245+54
Oct 16, 2026191-43
Oct 15, 2026234+15
Oct 14, 20262190
Oct 13, 20262190
Oct 09, 2026219+1
Oct 08, 20262180
Oct 07, 2026218+2
Oct 06, 2026216+4
Oct 05, 20262120
Oct 02, 2026212No prior observation