OITracker Cboe delayed data

Contract OI history

Back to BSX

Oct 23, 2026 EXPIRATION

BSX $43.50 Put

BSX261023P00043500

Latest saved OI845Oct 23, 2026
Last change+105vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $43.50 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. 8454220 2026-10-02: 0 OI2026-10-05: 0 OI2026-10-06: 1 OI2026-10-07: 1 OI2026-10-08: 1 OI2026-10-09: 1 OI2026-10-13: 207 OI2026-10-14: 207 OI2026-10-15: 178 OI2026-10-16: 178 OI2026-10-21: 740 OI2026-10-23: 845 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, 2026Viewing845+105
Oct 21, 2026740+562
Oct 16, 20261780
Oct 15, 2026178-29
Oct 14, 20262070
Oct 13, 2026207+206
Oct 09, 202610
Oct 08, 202610
Oct 07, 202610
Oct 06, 20261+1
Oct 05, 202600
Oct 02, 20260No prior observation