The fund normally invests at least 80% of its net assets in inflation-linked debt securities. It invests primarily in investment-grade securities, but may also invest a portion of its assets in high-yield securities, or junk bonds. The fund also may invest a portion of its net assets in fixed-income securities that are not linked to inflation. It may invest up to 20% of its total assets in securities denominated in foreign currencies and may invest beyond this limit in U.S. dollar denominated securities of foreign issuers.