OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

BSX $55.00 Call

BSX261120C00055000

Latest saved OI5,257Oct 23, 2026
Last change-16vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $55.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 5,3122,6560 2026-10-02: 5,312 OI2026-10-05: 5,311 OI2026-10-06: 5,304 OI2026-10-07: 5,298 OI2026-10-08: 5,298 OI2026-10-09: 5,298 OI2026-10-13: 5,289 OI2026-10-14: 5,289 OI2026-10-15: 5,283 OI2026-10-16: 5,271 OI2026-10-21: 5,273 OI2026-10-23: 5,257 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, 2026Viewing5,257-16
Oct 21, 20265,273+2
Oct 16, 20265,271-12
Oct 15, 20265,283-6
Oct 14, 20265,2890
Oct 13, 20265,289-9
Oct 09, 20265,2980
Oct 08, 20265,2980
Oct 07, 20265,298-6
Oct 06, 20265,304-7
Oct 05, 20265,311-1
Oct 02, 20265,312No prior observation