What is the name of the broadest measure of the U.S. stock market, tracking 500 large companies listed on stock exchanges and widely regarded as the best gauge of large-cap equities?

• A S&P 500 ✓
• B Dow Jones Industrial Average
• C Russell 2000
• D NASDAQ Composite

The Standard & Poor's 500, introduced in 1957, is a market-capitalisation-weighted index covering about 80 percent of available U.S. market capitalisation.