Moody's "moved the outlook on the Aaa government bond rating of the United States back to stable, replacing the negative outlook that has been in place since August 2011," the company said in a statement.
Moody's also pointed out yesterday that the top triple-A rating was still warranted on US sovereign debt.
Moody's said the outlook upgrade reflected its view "that the federal government's debt trajectory is on track to meet the criteria laid out in August 2011 for a return to a stable outlook."
"The US budget deficits have been declining and are expected to continue to decline over the next few years.
"Furthermore, the growth of the US economy, which, while moderate, is currently progressing at a faster rate compared with several Aaa peers and has demonstrated a degree of resilience to major reductions in the growth of government spending," the company said.
For those reasons, Moody's said, the US government's ratio of debt to gross domestic product (GDP) will fall more sharply through 2018 than the company had estimated when it downgraded the outlook nearly two years ago.
"Despite the more favorable fiscal outlook over the next several years, without further fiscal consolidation efforts, government deficits are anticipated to increase once again over the longer term."
Such an outcome could once again weigh on the US triple-A rating but at this point appears unlikely, it said.
Moody's said the outlook upgrade came after the Congressional Budget Office (CBO) projected the budget deficit for the 2013 fiscal year that ends on September 30 would fall to 4.0 per cent of GDP from 7.0 per cent in 2012.
