OITracker Cboe delayed data

Contract OI history

Back to BSX

Nov 20, 2026 EXPIRATION

BSX $35.00 Put

BSX261120P00035000

Latest saved OI7,439Oct 23, 2026
Last change-14vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $35.00 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. 7,4683,7340 2026-10-02: 7,241 OI2026-10-05: 7,255 OI2026-10-06: 7,260 OI2026-10-07: 7,271 OI2026-10-08: 7,271 OI2026-10-09: 7,369 OI2026-10-13: 7,466 OI2026-10-14: 7,466 OI2026-10-15: 7,468 OI2026-10-16: 7,408 OI2026-10-21: 7,453 OI2026-10-23: 7,439 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, 2026Viewing7,439-14
Oct 21, 20267,453+45
Oct 16, 20267,408-60
Oct 15, 20267,468+2
Oct 14, 20267,4660
Oct 13, 20267,466+97
Oct 09, 20267,369+98
Oct 08, 20267,2710
Oct 07, 20267,271+11
Oct 06, 20267,260+5
Oct 05, 20267,255+14
Oct 02, 20267,241No prior observation