The fund seeks to maximize total returns primarily from a universe of U.S. and foreign corporate debt securities that mature within twenty years from the date of settlement. The Portfolio generally emphasizes investments in debt securities rated A+ to BBB- by S&P or Fitch or A1 to Baa3 by Moody’s. The Portfolio may also invest in higher-rated investment grade securities and/or below-investment grade securities depending on the expected credit premium.