The fund invests at least 80% of its assets in bonds and other debt securities, which may be represented by derivatives. It invests at least 60% of its assets in debt securities rated A3 or better or A- or better by Nationally Recognized Statistical Ratings Organizations designated by the fund’s investment adviser, or in debt securities that are unrated but determined to be of equivalent quality by the fund’s investment adviser, and in U.S. government securities, money market instruments, cash or cash equivalents.