Portfolios of smaller stocks have tended to outperform the market averages by small amounts. If you have no trouble sleeping during bear markets, and if you have the staying power to stick with your investments, an aggressive common-stock portfolio may be just right for you. Even greater returns, as well as greater market swings, are likely from portfolios of stocks from many emerging markets such as China, India, and Brazil that have tremendous growth potential in the twenty-first century.