Long-Term Rating A1
Moody's long-term obligation ratings are opinions of the relative credit risk of fixed-income obligations with an original maturity of one year or more. They address the possibility that a financial obligation will not be honoured as promised. Such ratings reflect both the likelihood of default and any financial loss suffered in the event of default.
Obligations rated A are considered upper-medium grade and are subject to low credit risk.
Note: Moody's appends numerical modifiers 1, 2, and 3 to each generic rating classification, from Aa through to Caa. The modifier 1 indicates that the obligation ranks in the higher end of its generic rating category; the modifier 2 indicates a mid-range ranking; and the modifier 3 indicates a ranking in the lower end of that generic rating category.
Short-Term Rating P-1
Moody's short-term ratings are opinions of the ability of issuers to honour short-term financial obligations. Ratings may be assigned to issuers, short-term programs or to individual short-term debt instruments. Such obligations generally have an original maturity not exceeding thirteen months, unless explicitly noted.
Moody's employs the following designations to indicate the relative repayment ability of rated issuers: Issuers (or supporting institutions) rated Prime-1 have a superior ability to repay short-term debt obligations.
Source www.moodys.com