Stocks fell on both sides of the Atlantic overnight, while US Treasuries gained as the midnight deadline to reach an agreement on continuing to fund the US government approached with no deal in sight.
At the centre of the standstill is President Barack Obama's Affordable Care Act, which Tea Party activists in the Republican party are determined to block. Congress is scheduled to meet later today in a final effort to end the stalemate.
"I'm afraid, based on what Speaker [John] Boehner has said so far, that we are going to look at a shutdown," Representative Chris Van Hollen of Maryland, the top Democrat on the House Budget Committee, told Bloomberg on Monday.
US Treasuries climbed, pushing yields on the 10-year bond as low as 2.59 per cent, the lowest level in nearly seven weeks.
In late afternoon trading in New York, the Dow Jones Industrial Average dropped 0.74 per cent, the Standard & Poor's 500 Index shed 0.43 per cent, and the Nasdaq Composite Index fell 0.17 per cent.