http://www.bbc.co.uk/news/business-24471623
Lew: Debt limit brinkmanship very dangerous
US Treasury Secretary Jack Lew has warned that pushing talks over the debt ceiling to the last minute could be "very dangerous".
He said that the US government could suddenly run out of money some time after 17 October, which would have "serious" repercussions.
He also warned that the Treasury's payment systems were not designed to work without funds for payment.
According to Mr Lew that would make it difficult to prioritise payments.
The current debt limit of $16.699 trillion was reached in May.
Since then the US Treasury has been using what are called extraordinary measures to keep paying the bills, but those measures run out on 17 October.
In his testimony before the Senate Finance Committee, Mr Lew said that the Treasury had big bills to pay soon after that date, including to hospitals and doctors under the Medicare scheme, to Social Security recipients, veterans and members of the armed forces.
Mr Lew underlined that, every week, the Treasury also has to refinance $100bn worth of debt in the form of US government bonds known as treasuries.
The US also has to pay interest on its huge debt burden.
An inability to pay that interest, or pay back debt if required, would put the US into default.
That would potentially have a "catastrophic" impact, according to Mr Lew, who cited a recent Treasury report.
Effects of a default would include a sharp fall in the dollar, a significant jump in US interest rates and negative effects on the global economy.
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