OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

BSX $40.00 Call

BSX270115C00040000

Latest saved OI675Oct 23, 2026
Last change+240vs 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. 6753370 2026-10-02: 419 OI2026-10-05: 423 OI2026-10-06: 424 OI2026-10-07: 427 OI2026-10-08: 427 OI2026-10-09: 433 OI2026-10-13: 434 OI2026-10-14: 434 OI2026-10-15: 445 OI2026-10-16: 438 OI2026-10-21: 435 OI2026-10-23: 675 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, 2026Viewing675+240
Oct 21, 2026435-3
Oct 16, 2026438-7
Oct 15, 2026445+11
Oct 14, 20264340
Oct 13, 2026434+1
Oct 09, 2026433+6
Oct 08, 20264270
Oct 07, 2026427+3
Oct 06, 2026424+1
Oct 05, 2026423+4
Oct 02, 2026419No prior observation