Fitch downgrades US credit rating to AA+, Treasury calls it ‘arbitrary’

Rating agency Fitch on Tuesday downgraded the U.S. government’s top credit rating, a move that drew an angry response from the White House and surprised investors, coming despite the resolution of the debt ceiling crisis two months ago.

Fitch downgraded the United States to AA+ from AAA, citing fiscal deterioration over the next three years and repeated down-the-wire debt ceiling negotiations that threaten the government’s ability to…