Last week's rally proved a little too hard to sustain at the start of the week as investors reassessed equity valuations near five-year highs. Still, shares of Apple were deemed to contain plenty of value as iPhone 5 sales already set records.
US economic data were disappointing, providing little incentive to commit fresh funds on Wall Street. Factory activity in New York state shrank for a second straight month in September, according to a report from the Federal Reserve Bank of New York.
A separate report suggests the uncertainty itself has hurt economic activity, pushing the US jobless rate higher than it would have been in times of higher confidence, according to San Francisco Fed research advisors Sylvain Leduc and Zheng Liu.
"Our model estimates that uncertainty has pushed up the US unemployment rate by between one and two percentage points since the start of the financial crisis in 2008," Leduc and Liu write. "To put this in perspective, had there been no increase in uncertainty in the past four years, the unemployment rate would have been closer to 6 per cent or 7 per cent than to the 8 per cent to 9 per cent actually registered."
In late afternoon trading in New York, the Dow Jones Industrial Average fell 0.33 per cent, the Standard & Poor's 500 shed 0.44 per cent, while the Nasdaq Composite Index declined 0.36 per cent.