The investment seeks high current income consistent with safety of capital. The fund invests at least 65% of net assets in (i) obligations of the U.S. Government, and its agencies and instrumentalities, and (ii) debt securities rated in one of the three highest ratings of S& P or Moody or if not rated, judged to be of comparable quality by Thornburg. It does not invest in any debt security rated lower than BBB by S&P or Baa by Moody of equivalent quality as determined by Thornburg.