Bid

A bid is an order to buy a stated quantity at a stated price or better. The highest bid in the book is the best bid, and it is one half of the quoted spread.

market microstructure · updated 2026-11-06

See also

• Ask — An ask, also called an offer, is an order to sell a stated quantity at a stated price or better. The lowest ask is the best offer.…
• Bid-ask spread — The bid-ask spread is the difference between the best bid and the best ask. It is the immediate cost of trading in and straight ba…
• Order book — The order book is the live list of all outstanding buy and sell orders for an instrument, arranged by price, that a trading venue …

Terms that refer here

Ask · Order book

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