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The total value of all outstanding shares of a publicly-traded company. The market capitalization is calculated by multiplying the shares outstanding by the price per share. Market capitalization is one of the basic measures of a publicly-traded company; it is a way of determining the rough value of a company. Generally speaking, a higher market capitalization indicates a more valuable company. Many exchanges and indices are weighted for market capitalization. It is informally known as market cap. See also: Large cap, Mid cap, Small cap.