There are three main bond rating agencies: Standard & Poor's, Fitch, and Moody's. The first two use similar ratings, with AAA being the best, followed by AA, A, BBB, BB, B, CCC, CC, C, and D with +/- used to further break down the ratings. Moody's ratings start with Aaa, then go to Aa, A, Baa, Ba, B, Caa, Ca, and C, and instead of pluses and minuses, use the numbers 1, 2, and 3, in descending order, to break it down further.