13. D D C in default bankruptcy petition filed C C C no interest in being paid or CC CC Ca most speculative CCC CCC Caa poor quality (may default) B B B lower grade (speculative) (some what speculative) BB BB Ba lower mediam grade BBB BBB Baa medium grade A A A upper mediam grade(strong) AA AA Aa highest quality (very strong) AAA AAA Aaa highest quality standard & Poor's Fitch IBCA credit risk Moody's credit rating