Buy apple stock?

Many investors buy Apple stock as part of an index fund, which is a collection of investments wrapped together. When you purchase an index fund, you're buying a group of investments designed to track a stock market index, like the S&P 500. Apple is included in the S&P 500 and is a large-cap stock — which refers to the company's size, so it is frequently among the top holdings of S&P 500 index funds and large-cap index funds.