OITracker Cboe delayed data

Contract OI history

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Mar 19, 2027 EXPIRATION

BSX $70.00 Call

BSX270319C00070000

Latest saved OI4,207Oct 23, 2026
Last change-4vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $70.00 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. 4,3222,1610 2026-10-02: 4,322 OI2026-10-05: 4,298 OI2026-10-06: 4,294 OI2026-10-07: 4,295 OI2026-10-08: 4,295 OI2026-10-09: 4,289 OI2026-10-13: 4,278 OI2026-10-14: 4,278 OI2026-10-15: 4,273 OI2026-10-16: 4,271 OI2026-10-21: 4,211 OI2026-10-23: 4,207 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, 2026Viewing4,207-4
Oct 21, 20264,211-60
Oct 16, 20264,271-2
Oct 15, 20264,273-5
Oct 14, 20264,2780
Oct 13, 20264,278-11
Oct 09, 20264,289-6
Oct 08, 20264,2950
Oct 07, 20264,295+1
Oct 06, 20264,294-4
Oct 05, 20264,298-24
Oct 02, 20264,322No prior observation