Investment grade

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A bond is considered investment grade or IG if its credit rating is BBB- or higher by Standard & Poor's or Baa3 or higher by Moody's or BBB(low) or higher by DBRS. Generally they are bonds that are judged by the rating agency as likely enough to meet payment obligations that banks are allowed to invest in them.

In this sense, the opposite of an investment-grade bond is speculative grade bond, derisively also known as a junk bond.

On the other hand, the risks associated with investment-grade bonds (or investment-grade corporate debt) are considered noticeably higher than in the case of first-class government bonds. The difference between rates for first-class government bonds and investment-grade bonds is called investment-grade spread. It is an indicator for the market's belief in the stability of the economy. The higher these investment-grade spreads (or risk premiums) are, the weaker the economy is considered.