By TheStreet Staff What Is a Fixed-Income Security? A fixed-income investment is an asset or security that provides its owner with income payments at regular intervals, usually in the form of interest or dividends. Common examples include bonds, shares of preferred stock, and certificates of deposit. Fixed-income securities are valued by investors for the income streams they provide rather than for their ability to appreciate in value. What Is Fixed-Income Investing? Fixed-income investing is pretty much what it sounds like—investing specifically in fixed-income securities like bonds and real …