Apr 26, 2019 When your portfolio gets into the $100,000 to $200,000 range, you should aim for perhaps 15 to 20 stocks. If you're married, it's best to treat your Once you have a preference in mind, you're ready to shop for an account. Building a diversified portfolio out of many individual stocks is possible, but it takes a significant investment. The upside How much money should I invest in stocks? We believe that you should have a diversified mix of stocks, bonds, and other of your portfolio is more likely to be growing, or at least not declining as much.