Moody's on Friday cut the U.S. credit rating by one notch, citing rising debt and interest payments that outpace those of similarly rated sovereigns, in a move that marks the end of an era as Moody's was the last major agency to maintain a triple-A rating for U.

The US lost its triple-A credit score with Moody's on Friday, with the credit ratings firm citing rising federal debt and interest costs. The US was downgraded from Aaa, the highest rating, to Aa1. Some sovereigns with an Aaa ratings from Moody's include the European Union,