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"Standard & Poor's on Monday downgraded the outlook for the United States to negative, saying it believes there's a risk U.S. policymakers may not reach agreement on how to address the country's long-term fiscal pressures.
"Because the U.S. has, relative to its 'AAA' peers, what we consider to be very large budget deficits and rising government indebtedness and the path to addressing these is not clear to us, we have revised our outlook on the long-term rating to negative from stable," the agency said in a statement.
In an interview with CNBC, David Beers, S&P's global head of sovereign ratings, said the agency has been "struck increasingly by the difference in how other governments are dealing with fiscal consolidation."
"The U.S. to us looks to be an increasing outlier in that context," Beers added.