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Characteristics of a Market Leader. A market leader is typically the company holding the largest market share in a particular industry or segment of an industry. Market leaders are often recognizable by the ubiquitous presence of their brand as well as their ongoing marketing efforts.
A specialist is a dealer representing a NYSE specialist firm-one of the main facilitators of trade on the exchange. A market maker is a broker-dealer who facilitates the trading of shares by posting bid and ask prices along with maintaining an inventory of shares.