A subset of the third-highest
bond rating by
Moody's. The other subsets are A2 and A3, both of which are slightly lower. Bonds with an A1 rating are
investment-grade, meaning that
banks are allowed to
hold them. Bonds with A1 ratings are low-
risk and low-
return, though not as much as Aa and Aaa ratings. The rating is equivalent to the A+ rating by S&P and
Fitch.