Standard & Poor's  Moody's 
Investment Grade
Strongest/highest quality, minimal credit risk AAA
Aaa
Strong/high quality, very low credit risk AA Aa
Upper-medium grade, low credit risk A A
Moderate credit risk BBB Baa
Sub-Investment Grade/High Yield
Speculative grade, higher credit risk BB, B Ba, B
Highly speculative, very high credit risk CCC, CC, C Caa, Ca
Default D C
Not rated or not available NR or NA NR or NA
Rating withdrawn WD WD
Details

Note: Standard & Poor's ratings from A to CCC may be modified by a plus (+) or minus (-) sign to show relative standing within the rating categories. Moddy's uses numerical modifiers 1, 2, and 3 in each category: The modifier 1 indicates that the obligation falls in the higher end of its category; the modifier 2 indicates a mid-range assessment; and the modifier 3 indicates a standing in the lower end of that rating category.

Disclosure Title
Source
Disclosure

Standard & Poor's and Moody's.