Market capitalization -

Market capitalization

Market capitalization (often market cap) is a measurement of the size of a business corporation. It is equal to the price of one share of stock, times the number of shares of stock in a public company. Owning stock in a company is owning a part of the company. Market capitalization shows the public opinion of a company's value. The total market capitalization of all publicly traded companies in the world was US$51.2 trillion in January 2007.[1] In May 2008 it rose to US$57.5 trillion,[2] but by September 2008 had dropped to a little more than US$40 trillion.[2]



Market capitalization represents the public opinion of the value of a company's equity. A public corporation, including all of its assets, may be bought and sold as stock. These purchases and sales will define the price of the company's share price. Market capitalization is the share price times by the number of shares in issue. This provides a total value for the company's shares and the value the company.

Some companies have stock that is privately owned, and not publicly traded. Many Stock markets adjust the market cap on the value of the publicly traded part of the company. In this case, market capitalization is based on the publicly traded stocks.

Note that market capitalization is a market estimate of a company's value. It is based how the public believes the company will perform in the future. There are many things that can affect the stock price. These include economic conditions and mergers and acquisitions.

Categorization of companies by capitalization

In the past, companies were separated into large-cap, mid-cap, and small-cap. New categories 'micro-cap' and 'nano-cap' have been added. There are general guidelines to know what category a company is in. These guidelines are adjusted over time due to changes in the market and the economy. For example, $1 billion was a large market cap in 1950 but it is not very large now.

A guideline may look like:[3]
Mega-cap Over $200 billion
Large-cap $10 billion–$200 billion
Mid-cap $1 billion–$10 billion
Small-cap $300 million–$1 billion
Micro-cap $50 million-$300 million

Different numbers are used by different stock markets. There is no official definition of the exact cutoffs. They also may be done by percentiles rather than fixed cutoffs.

Related measures

Market cap reflects only the equity value of a company. A more comprehensive measure is enterprise value (EV), which includes debt and other factors. Insurance firms use a value called the embedded value (EV).


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