OITracker Cboe delayed data

Contract OI history

Back to BSX

Nov 20, 2026 EXPIRATION

BSX $40.00 Call

BSX261120C00040000

Latest saved OI684Oct 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 $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. 6903450 2026-10-02: 297 OI2026-10-05: 300 OI2026-10-06: 300 OI2026-10-07: 301 OI2026-10-08: 301 OI2026-10-09: 674 OI2026-10-13: 688 OI2026-10-14: 688 OI2026-10-15: 690 OI2026-10-16: 683 OI2026-10-21: 686 OI2026-10-23: 684 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, 2026Viewing684-2
Oct 21, 2026686+3
Oct 16, 2026683-7
Oct 15, 2026690+2
Oct 14, 20266880
Oct 13, 2026688+14
Oct 09, 2026674+373
Oct 08, 20263010
Oct 07, 2026301+1
Oct 06, 20263000
Oct 05, 2026300+3
Oct 02, 2026297No prior observation