The Nasdaq Composite is an often-cited stock market index — along with the S&P 500 and the Dow Jones Industrial Average — ...

Like most major stock indexes, the Nasdaq Composite is weighted by the market capitalizations of its underlying components. This means that when larger companies' stocks move, it has a greater ...

The NASDAQ-100 is widely followed as a measure mainly of the big tech and social media stocks that make up the index.