OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

BSX $45.00 Put

BSX280121P00045000

Latest saved OI6,470Oct 23, 2026
Last change-3vs 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. 6,4763,2380 2026-10-02: 2,473 OI2026-10-05: 2,483 OI2026-10-06: 6,457 OI2026-10-07: 6,458 OI2026-10-08: 6,458 OI2026-10-09: 6,456 OI2026-10-13: 6,469 OI2026-10-14: 6,469 OI2026-10-15: 6,476 OI2026-10-16: 6,476 OI2026-10-21: 6,473 OI2026-10-23: 6,470 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, 2026Viewing6,470-3
Oct 21, 20266,473-3
Oct 16, 20266,4760
Oct 15, 20266,476+7
Oct 14, 20266,4690
Oct 13, 20266,469+13
Oct 09, 20266,456-2
Oct 08, 20266,4580
Oct 07, 20266,458+1
Oct 06, 20266,457+3,974
Oct 05, 20262,483+10
Oct 02, 20262,473No prior observation