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Contract OI history

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Oct 23, 2026 EXPIRATION

B $40.50 Call

B261023C00040500

Latest saved OI579Oct 23, 2026
Last change+71vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $40.50 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. 5792890 2026-10-02: 0 OI2026-10-05: 2 OI2026-10-06: 2 OI2026-10-07: 2 OI2026-10-08: 4 OI2026-10-09: 6 OI2026-10-13: 17 OI2026-10-14: 28 OI2026-10-15: 81 OI2026-10-16: 113 OI2026-10-21: 508 OI2026-10-23: 579 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

B contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing579+71
Oct 21, 2026508+395
Oct 16, 2026113+32
Oct 15, 202681+53
Oct 14, 202628+11
Oct 13, 202617+11
Oct 09, 20266+2
Oct 08, 20264+2
Oct 07, 202620
Oct 06, 202620
Oct 05, 20262+2
Oct 02, 20260No prior observation