• A bond rating is a letter-based credit scoring scheme used to assess the quality and creditworthiness of a bond.

  • Investment grade bonds are rated ‘AAA’ to ‘BBB-’ by Standard & Poor’s and Aaa to Baa3 by Moody’s. Junk bonds have lower ratings.
  • The higher the rating of the bond, the lower the interest rate will be, other things being equal.