That’s what you get when you buy an index fund—a reliable and cost-effective way to build long-term wealth that’s suitable for nearly every investor, according to a range of personal finance experts.
An index fund is a group of stocks that track a specific market or sector. For example, an index fund that tracks the S&P 500 would allow you to invest in each of the 500 largest publicly traded companies in the U.S., all at once for a low fee.