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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.
Market makers hold large volumes of a security and can fulfill a large amount of orders in the financial markets. These orders are purchases and sales and happen in a matter of seconds. A good example of a market maker is a standard online brokerage firm such as Charles Schwab or Merrill Edge that can fill security orders quickly and efficiently.