Bonds can help diversify your portfolio, but they are not risk-free. Find out how bonds work, and how to put them to work for you. Thinkstock By the editors of Kiplinger's Personal Finance Updated January 2015 Bonds belong in your investment plan for good reasons, but maybe not for the reasons you think. Economic forces that depress stock prices — the early stages of a recession, for instance — tend to boost bond prices. Bonds can generate impressive profits from capital gains. Sometimes you can even calculate those gains years in advance on the day you buy the bonds. Bonds can provide a predictable stream of relatively high income you can use for living expenses or for funding other parts of your investment plan. Some kinds of bonds offer valuable tax advantages and unparalleled opportunities to take advantage of the time value of money, that is, to invest a modest amount with a reasonable prospect of collecting a large amount a few years later.See Also: Investing for Income Note that the word "safety" doesn't appear in that list of bond benefits. A lot of people think bonds are about the safest investment around, but such a notion can be costly. To learn more about how to invest in bonds, check out the following stories: The Basics of Bond Ownership Bonds come in a variety of forms, but they all share these basic traits. Pick Your Type Not all bonds are created equal. From agencies to zero-coupons, learn the basics behind a variety of bonds. The Relationship Between Yield and Price You'll know how much interest you'll receive from the beginning, but you can also profit from price moves on the secondary market. Riding the Yield Curve This simple relationship between long- and short-term interest rates can tell you a lot about the bond market. How to Reduce the Risks Bonds have risks you won't find in other types of investments. Find out how to spot risky bonds and how to avoid them.