If securities are rated differently by the rating agencies, the higher rating is applied. NR indicates the debtor was not rated, and should not be interpreted as indicating low quality.
Ratings are measured on a scale that generally ranges from AAA (highest) to D (lowest) ratings are subject to change without notice. A credit rating is an assessment provided by a nationally recognized statistical rating organization (NRSRO) of the creditworthiness of an issuer with respect to debt obligations, including specific securities, money market instruments or other debts. Ratings are based on S&P, Moody's or Fitch, as applicable.
