Bond Rating

A bond rating is a credit quality assessment assigned by major rating agencies — Standard & Poor's (S&P), Moody's, and Fitch — that evaluates the likelihood a bond issuer will meet its debt obligations. Ratings range from AAA/Aaa (highest quality, minimal default risk) to D (in default). The critical dividing line is between investment grade (BBB-/Baa3 and above) and speculative grade or "junk" (BB+/Ba1 and below). Each notch lower in rating typically means higher yields to compensate for greater default risk. Institutional investors like pension funds and insurance companies are often restricted to holding only investment-grade bonds. Rating agencies analyze factors including the issuer's financial statements, cash flow stability, industry position, management quality, and macroeconomic conditions. A rating downgrade can trigger forced selling by institutional holders and significantly increase an issuer's borrowing costs, while an upgrade reduces borrowing costs.