Bond Ratings

Here are Moody's ratings, from highest to lowest. Investment grade: Aaa, Aa1, Aa2, Aa3, A1, A2, A3, Baa1, Baa2, Baa3. Speculative grade: Ba1, Ba2, Ba3, B1, B2, B3, Caa1, Caa2, Caa3, Ca, C1.

Here are S&P's ratings. Investment grade: AAA, AA+, AA, AA-, A+, A, A-, BBB+, BBB, BBB-. Speculative grade: BB+, BB, BB-, B+, B, B-, CCC+, CCC, CCC-, CC, D.

The Ratings Game

A rating downgrade or upgrade on a company's debt can have a big impact on the company's stock, so it's best to check TheStreet.com for the latest moves.