In Europe, the Stoxx 600 Index ended the session with a 1.4 per cent drop from the previous close. National benchmark indexes in Germany, France and the UK declined too, shedding 2 per cent, 2 per cent and 1.6 per cent respectively.
There was more gloom for the outlook of the euro zone economy. The European Commission said it expects the 17-nation economy to grow a mere 0.1 per cent in 2013, down from a May prediction for 1 per cent growth.
It also slashed its forecast for Germany's economic expansion, saying it now expects Europe's largest economy to increase 0.8 per cent, instead of 1.7 per cent.
The forecast came as European Central Bank President Mario Draghi told a conference in Frankfurt that the region's problems "are now starting to affect the German economy".
Retail sales in the euro region also took a beating, falling more than anticipated in September. Retail sales dropped 0.2 per cent from August, according to the European Union's statistics office.
Meanwhile, Greece lawmakers are scheduled to vote today on a fresh, and unpopular, austerity package to satisfy conditions to secure the next tranche of international bailout funds.