Best Ask


DEFINITION of 'Best Ask'

The lowest quoted offer price among all those offered by competing market makers for a particular trading instrument. The ask price is effectively the lowest price that a seller is willing to offer for an asset, and the best ask is the most favorable ask price offered at a given time for a particular security. Ask is also known as the offer price.


The National Best Bid and Offer (NBBO) are the bid and ask prices that traders and investors typically see. Active traders, short-term traders and day traders often study Level 2 quotes that include all the current bids and asks for a particular trading instrument. The NBBO is continually updated throughout the trading session, so that customers have access to these prices.

  1. National Best Bid and Offer - NBBO

    A term applying to the SEC requirement that brokers must guarantee ...
  2. Level 2

    A trading service consisting of real-time access to the quotations ...
  3. Touchline

    The highest price that a buyer of a particular security is willing ...
  4. Ask

    The price a seller is willing to accept for a security, also ...
  5. Market Maker

    A broker-dealer firm that accepts the risk of holding a certain ...
  6. Best Bid

    The highest quoted bid for a particular trading instrument among ...
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