OITracker Cboe delayed data

Contract OI history

Back to BSX

Jan 15, 2027 EXPIRATION

BSX $42.50 Call

BSX270115C00042500

Latest saved OI387Oct 23, 2026
Last change-1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $42.50 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. 4192090 2026-10-02: 344 OI2026-10-05: 345 OI2026-10-06: 365 OI2026-10-07: 413 OI2026-10-08: 413 OI2026-10-09: 419 OI2026-10-13: 397 OI2026-10-14: 397 OI2026-10-15: 397 OI2026-10-16: 396 OI2026-10-21: 388 OI2026-10-23: 387 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, 2026Viewing387-1
Oct 21, 2026388-8
Oct 16, 2026396-1
Oct 15, 20263970
Oct 14, 20263970
Oct 13, 2026397-22
Oct 09, 2026419+6
Oct 08, 20264130
Oct 07, 2026413+48
Oct 06, 2026365+20
Oct 05, 2026345+1
Oct 02, 2026344No prior observation