OITracker Cboe delayed data

Contract OI history

Back to BSX

Dec 18, 2026 EXPIRATION

BSX $45.00 Put

BSX261218P00045000

Latest saved OI3,963Oct 23, 2026
Last change+36vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $45.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 3,9631,9810 2026-10-02: 3,671 OI2026-10-05: 3,689 OI2026-10-06: 3,734 OI2026-10-07: 3,772 OI2026-10-08: 3,772 OI2026-10-09: 3,771 OI2026-10-13: 3,774 OI2026-10-14: 3,774 OI2026-10-15: 3,798 OI2026-10-16: 3,852 OI2026-10-21: 3,927 OI2026-10-23: 3,963 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, 2026Viewing3,963+36
Oct 21, 20263,927+75
Oct 16, 20263,852+54
Oct 15, 20263,798+24
Oct 14, 20263,7740
Oct 13, 20263,774+3
Oct 09, 20263,771-1
Oct 08, 20263,7720
Oct 07, 20263,772+38
Oct 06, 20263,734+45
Oct 05, 20263,689+18
Oct 02, 20263,671No prior observation