A bid is an offer made by an investor, trader, or dealer in an effort to buy a security, commodity, or currency. A bid stipulates the price the potential buyer is willing to pay, as well as the quantity he or she will purchase, for that proposed price. A bid also refers to the price at which a market maker is willing to buy a security. But unlike retail buyers, market makers must also display an ask price—Read more at Investopedia. Chen, James. “Bid Definition.” 13 May 2019.