OITracker Cboe delayed data

Contract OI history

Back to BSX

Jun 17, 2027 EXPIRATION

BSX $40.00 Put

BSX270617P00040000

Latest saved OI7,198Oct 23, 2026
Last change+20vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $40.00 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. 7,3883,6940 2026-10-02: 7,295 OI2026-10-05: 7,304 OI2026-10-06: 7,322 OI2026-10-07: 7,333 OI2026-10-08: 7,333 OI2026-10-09: 7,359 OI2026-10-13: 7,383 OI2026-10-14: 7,383 OI2026-10-15: 7,383 OI2026-10-16: 7,388 OI2026-10-21: 7,178 OI2026-10-23: 7,198 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, 2026Viewing7,198+20
Oct 21, 20267,178-210
Oct 16, 20267,388+5
Oct 15, 20267,3830
Oct 14, 20267,3830
Oct 13, 20267,383+24
Oct 09, 20267,359+26
Oct 08, 20267,3330
Oct 07, 20267,333+11
Oct 06, 20267,322+18
Oct 05, 20267,304+9
Oct 02, 20267,295No prior observation