The S&P 500 stock list is available for viewing on the official Standard & Poor's website under the equities index, notes Investopedia. It is also accessible from other finance sites, such as CNN and Bloomberg.
Widely considered to be the best gauge of United States market activity, the S&P 500 index constantly evaluates $7.8 trillion worth of market value. It carries the name of the S&P 500 because it includes the 500 most influential companies in the United States. As of 2015, these 500 top companies make up roughly 80 percent of all total market activity in the domestic stock market, reports McGraw Hill Financial.