Fitch yesterday placed the United States's top-grade AAA rating on a "negative watch", citing the possibility the Treasury could default on its obligations after October 17 if the ceiling is not raised.
"The US authorities have not raised the federal debt ceiling in a timely manner," Fitch said.
"Although Fitch continues to believe that the debt ceiling will be raised soon, the political brinkmanship and reduced financing flexibility could increase the risk of a US default."
US Treasury Secretary Jacob Lew has repeatedly warned that as of October 17 the government will not have any more room to borrow under the ceiling to cover the federal deficit, and that the Treasury's cash level will be a small USD 30 billion.
After that, the risk steadily rises that the Treasury will default on its obligations, including possibly its debt.
"The Treasury may be unable to prioritise debt service, and it is unclear whether it even has the legal authority to do so," noted Fitch.
In addition, it said, "the prolonged negotiations over raising the debt ceiling... Risks undermining confidence in the role of the US dollar as the preeminent global reserve currency."
Fitch said that if the US was forced into default, it would reduce the US sovereign credit grade to "restricted default" based on the belief that Washington would quickly move to make good on the debt.
Still, Fitch said that if and when the political gridlock is overcome and the ceiling is raised, allowing the Treasury to balance its finances, it would review the rating based on how the problem was solved "and the perceived risk of a similar episode occurring in the future."
The proposals in Congress yesterday left open the prospect for a new crisis in January and February.
A Treasury spokesperson said in reaction: "The announcement reflects the urgency with which Congress should act to remove the threat of default hanging over the economy.
