http://wikiless.i2p/wiki/Bond_credit_rating?lang=en
Moody's assigns bond credit ratings of Aaa , Aa, A, Baa, Ba, B, Caa, Ca, C, as well as WR and NR for 'withdrawn' and 'not rated' respectively. [ 4 ] Standard & Poor's and Fitch assign bond credit ratings of AAA, AA, A, BBB, BB, B, CCC, CC, C, D.