S&P and Fitch use a comparable rating system for the quality of short-term bonds.
(1) categories: A, B, and C for S&P vs F, B and C for Fitch
(2) classes for A and F are 1+, 1, 2 and 3
Investment grade: A (S&P) or F (Fitch)
Non-investment grade (high-yield, junk): B or C
S & P
A-1, A-2, A-3
F1, F2, F3
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