Under normal circumstances, the Fund seeks to achieve its investment objective by investing at least 80% of its Assets in investment grade, U.S. dollar denominated short-term fixed, variable and floating rate debt. Assets means net assets, plus the amount of borrowings for investment purposes. As part of its principal investment strategy, the Fund may invest in corporate securities, asset-backed securities, mortgage-backed and mortgage-related securities, and high quality money market instruments such as commercial paper and certificates of deposit. The Fund may also invest in U.S. Treasury securities (including Separate Trading of Registered Interest and Principal of Securities (STRIPS)), securities issued or guaranteed by the U.S. government or its agencies and instrumentalities, securities issued or guaranteed by foreign governments, repurchase agreements, when-issued securities, delayed delivery securities, forward commitments, zero-coupon securities and privately placed securities. All securities will be U.S. dollar-denominated although they may be issued by a foreign corporation or a U.S. affiliate of a foreign corporation, or a foreign government or its agencies and instrumentalities.