3. The Difference between Stocks and Stock Mutual Funds

Stock mutual funds or exchange-traded funds. Mutual funds let you purchase small pieces of many different stocks in a single transaction. Index funds and ETFs are a kind of mutual fund that tracks an index; for example, a Standard & Poor’s 500 fund replicates that index by buying the stock of the companies in it.
When you invest in a fund, you also own small pieces of each of those companies. You can put several funds together to build a diversified portfolio. Note that stock mutual funds are also sometimes called equity mutual funds.
Individual stocks. If you’re after a specific company, you can buy a single share or a few shares as a way to dip your toe into the stock-trading waters. Building a diversified portfolio out of many individual stocks is possible, but it takes a significant investment.