OITracker Cboe delayed data

Contract OI history

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Sep 17, 2027 EXPIRATION

BSX $50.00 Put

BSX270917P00050000

Latest saved OI1,319Oct 23, 2026
Last change-1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $50.00 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. 1,3206600 2026-10-02: 1,083 OI2026-10-05: 1,083 OI2026-10-06: 1,183 OI2026-10-07: 1,183 OI2026-10-08: 1,183 OI2026-10-09: 1,233 OI2026-10-13: 1,233 OI2026-10-14: 1,233 OI2026-10-15: 1,233 OI2026-10-16: 1,233 OI2026-10-21: 1,320 OI2026-10-23: 1,319 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, 2026Viewing1,319-1
Oct 21, 20261,320+87
Oct 16, 20261,2330
Oct 15, 20261,2330
Oct 14, 20261,2330
Oct 13, 20261,2330
Oct 09, 20261,233+50
Oct 08, 20261,1830
Oct 07, 20261,1830
Oct 06, 20261,183+100
Oct 05, 20261,0830
Oct 02, 20261,083No prior observation