What Market Makers Do Market makers literally make markets for stocks, thus their name. They typically are banks or brokerage companies that stand ready every second of the trading day with firm ask-and-bid prices. This is good for you because when you place a market order to sell your 1,000 shares of Disney, a market maker will purchase the stock from you, even if it doesn't have a seller lined up. The same process happens when placing a market order to buy shares of stock.
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