OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

BSX $40.00 Call

BSX280121C00040000

Latest saved OI8,098Oct 23, 2026
Last change-12vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
BSX $40.00 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. 8,1944,0970 2026-10-02: 8,060 OI2026-10-05: 8,000 OI2026-10-06: 8,036 OI2026-10-07: 8,082 OI2026-10-08: 8,082 OI2026-10-09: 8,103 OI2026-10-13: 8,194 OI2026-10-14: 8,194 OI2026-10-15: 8,118 OI2026-10-16: 8,133 OI2026-10-21: 8,110 OI2026-10-23: 8,098 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, 2026Viewing8,098-12
Oct 21, 20268,110-23
Oct 16, 20268,133+15
Oct 15, 20268,118-76
Oct 14, 20268,1940
Oct 13, 20268,194+91
Oct 09, 20268,103+21
Oct 08, 20268,0820
Oct 07, 20268,082+46
Oct 06, 20268,036+36
Oct 05, 20268,000-60
Oct 02, 20268,060No prior observation