Index Name: Standard & Poor’s 500 Index.
Nickname: S&P 500.
Publishing Company: Standard & Poor’s.
Base Year: 1,957 (developed from an earlier index established in 1,923).
Number of Components: 500.
Weight: According to Market Cap.
The S&P 500 is made up of 500 leading companies, representing all sectors of the American economy, and is meant to represent the entire American stock market. The index was created in $
Due to the large number of companies included in it, due to their beings pread out across the entire economy, the S&P 500 is thought to be a very good indicator of the stock market’s direction. Many investors use the index as a benchmark to measure the performance of their portfolios and mutual funds.
Click here for an alphabetical listing of the 500 companies included in the S&P 500.
The S&P 500 Since 1957 (the y-axis is labeled in index units)