The fund will invest at least 80 percent of its assets in bonds and other debt securities that accrue income, which may be represented by derivatives. Under normal circumstances, the fund will invest primarily in investment grade, U.S. dollar denominated short-term debt, including as high-quality, short-term money market instruments such as commercial paper and certificates of deposit; U.S. Treasury securities and other government securities guaranteed or issued by an agency or instrumentality of the U.S. government; corporate securities; and asset-backed securities. The fund may invest substantially in debt securities that are tied economically to countries outside the United States, including securities issued by foreign corporations or foreign governments and their agencies and instrumentalities.