A Booklist Top Ten Financial Series for Youth. Most people have heard of savings bonds. You may even own some of these low-risk Treasuries yourself, but did you know there are other types of Treasuries-or bonds_issued by the United States government, as well? Bonds are among the most common investments in the world today. Buying them isn't difficult, but it can be confusing, especially for new investors. Use this guide to learn the important differences between Treasuries, municipal bonds (including general obligation and revenue bonds), and corporate bonds. Together these investments can help you create a diversified financial portfolio.