Nasdaq is a competing dealer market, different from an auction market in that many dealers, called Market Makers, use their own capital, research, retail, and/or systems resources to represent a stock. Many Market Makers can represent the same stock; thus, they compete with each other to buy and sell that stock. Auction markets have only one person, a specialist, who in a centralized location or "floor," matches incoming orders to buy and sell each stock. Specialists are not allowed to provide research or retail sales support, and are limited to only one firm's available capital. The average Nasdaq stock has eleven Market Making firms that risk and invest their capital.