VOO

VOO is the Vanguard S&P 500 ETF, a fund that holds the 500 largest US companies in roughly the same proportions as the S&P 500 index. When you buy one share, you own a tiny slice of giants like Apple, Microsoft, and Amazon all at once, so your money rises and falls with the broad US stock market rather than any single business. Vanguard makes money by charging a very small yearly fee, one of the lowest in the industry, which is why VOO is one of the most popular ways for ordinary investors to own the whole market cheaply.