The fund will principally invest in the following securities: commercial and residential mortgage-backed securities; obligations of non-U.S. governments and supra-national organizations, such as the World Bank, which are chartered to promote economic development; obligations of domestic and non-U.S. corporations; asset-backed securities; collateralized mortgage obligations; U.S. Treasury and agency securities; when-issued and delayed delivery securities; derivatives; cash equivalent investments; repurchase agreements and reverse repurchase agreements; and dollar rolls.