Bullish sentiment jumped to its highest level since January 13, 2011, in the latest AAII Sentiment Survey.

OPEC cut its oil-demand growth numbers for 2012 again as Asian economies slow, but the group kept pumping at levels not seen since 2008 amid Iranian disruptions fears.

Greece's finance minister headed for Brussels to try to clinch a new aid deal with European partners after all-night talks in Athens stumbled over demands for deep cuts in pension benefits.

U.S. stock futures were slightly down ahead of policy decisions from the Bank of England and the European Central Bank and as investors monitored Greece's debt saga.

European stocks opened higher amid mounting expectations that Greece will be able to secure a second bailout and avoid a default.