U.S. government debt to keep top rating, Moody's says

Moody's Investors Service said the sovereign debt of the U.S. will continue to be rated Aaa, the agency's highest category, despite concerns about the nation's exploding debt. The growing burden could put "negative pressure on the rating in the future," said Steven Hess, vice president and senior credit officer at Moody's, but the Aaa rating is stable for now.