According to credit rating agency Moody’s, debt obligations of the United States federal government are “judged to be of the highest quality, subject to the lowest level of credit risk” and thus are worthy of a “AAA” credit rating.
The other two major credit rating agencies, Standard & Poor’s and Fitch, disagree. These firms place an “AA+” rating on federal debt. For its part, Moody’s is not fully convinced of its AAA rating, as it recently added a “negative” label, implying that the rating is no longer “stable.”