"This was a very encouraging report as the improvement in both export and non-petroleum import activity suggests improving demand both domestically and globally," Millan Mulraine, an economist at TD Securities in New York, told Reuters.
In afternoon trading in New York, the Dow Jones Industrial Average declined 0.33 per cent, as did the Standard & Poor's 500 Index, while the Nasdaq Composite Index fell 0.56 per cent.
In Europe, the Stoxx 600 Index ended the session with a 0.2 per cent drop from the previous close. National benchmark indexes in Germany, France and the UK also closed lower. The euro was last 0.2 per cent weaker against the greenback.
"Economic activity in the euro area is expected to remain weak," European Central Bank President Mario Draghi said in a statement at the end of the bank's policy meeting.
His comments came a day after the European Commission slashed its forecast for the euro zone to a measly 0.1 per cent in 2013, down from a May estimate for 1 per cent growth.
Earlier today policymakers at both the ECB and the Bank of England kept their record-low interest rates on hold, at 0.75 per cent and 0.5 per cent respectively.
While Greek Prime Minister Antonis Samaras secured a parliamentary majority for a package of austerity measures, EU finance ministers may not make a decision on unlocking funds for Greece until late November.
The ministers are waiting for a full report on the country's compliance with the terms of its bailout, Bloomberg News reported, citing an anonymous European Union official.
As for whether Europe's central bank is prepared to do more for Greece, Draghi told reporters: "The ECB is by and large done."
Greece's benchmark stock index shed 3.8 per cent today.