To achieve its objective at least 80 percent of the Fund's net assets in a portfolio of bonds or derivative instruments having economic characteristics similar to bonds. For purposes of this 80 percent policy, bonds includes dollar rolls, U.S. government and foreign government bonds and notes, agency and non-agency mortgage-backed, commercial mortgage-backed, and asset-backed securities, corporate bonds of issuers in the US and foreign countries, convertible bonds and other convertible securities, bank loans and loan participations, structured notes, and preferred securities.