microstructure

Best Bid And Offer (BBO)

Best Bid And Offer (BBO) is the top-of-book quote pair showing the highest price a buyer is willing to pay (the best bid) and the lowest price a seller is willing to accept (the best offer) at a specific moment.

Example: At 10:03 a.m., the Best Bid for XYZ was 120.50 and the Best Offer was 120.55, indicating a 0.05 spread.

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