Arithmetic average weighted share prices of these companies are also known
as the S & P 500. The capitalization is used the weights in calculation. The S & P 500 is competing with the Dow Jones and deservedly called a barometer of the U.S. economy.
Shares of all companies in the S & P 500 are traded on major U.S. exchanges such as the New York Stock Exchange and NASDAQ.
List of stocks in the S & P 500 is not a simple list of the largest companies in the U.S., as there are not companies, privately owned and the companies that have insufficient liquidity. In addition, when the list is being completing the authors attempt to provide the most complete variety of American industries.