Fitch Ratings on Wednesday warned again that the United States’ rising debt burden was not consistent with maintaining the country’s top AAA credit rating, but said there would likely be no decision on whether to cut the rating before 2013.

Last month, Fitch changed its U.S. credit rating outlook to negative from stable, citing the failure of a special congressional committee to agree on at least $1.2 trillion in deficit-reduction measures.

“Federal debt will rise in the absence of expenditure and tax reforms that would address the challenges of rising health and social security spending as the population ages,” Fitch said in a statement.

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