Fitch Affirms Triple-A Rating for U.S.

Fitch Ratings Inc. affirmed its Triple-A rating for the U.S., citing the nation's "unparalleled financing flexibility as the issuer of the world's pre-eminent reserve currency and benchmark fixed-income asset, and as home to the world's deepest and most liquid capital markets."

The rating firm said "renewed brinkmanship over the federal debt ceiling is possible in 2015, although its suspension in February 2014 was in a timely manner and in a way that avoided casting uncertainty over the full faith and credit of the U.S."

In March, Fitch affirmed its rating for the U.S. and removed it from Rating Watch Negative.