Broad-based and total stock market indexes can be used interchangeably. However, most broad-based indexes, such as the S&P 500 and Dow Jones Industrial Average (DIJA)  include mostly large, well-known companies. Total stock market indexes, as the name implies, look to track the entire U.S. stock market, such as the CRSP U.S. Total Market Index and Dow Jones U.S. Total Stock Market Index, which have around 4,000 holdings each.