At a meeting of European finance ministers in Poland, leaders largely rejected proposals from Treasury Secretary Timothy Geithner on how to rescue the ailing eurozone.
The coalition government in Germany, the biggest contributor to the eurozone rescue fund, appears split over over a possible sovereign default for Greece.
European financial institutions lashed out at Moody's after the agency unexpectedly downgraded Portugal's government debt rating, adding new uncertainty about Europe's financial stability.
Standard & Poor's called the proposal to roll over Greek debt tantamount to default. In Germany, some economists are challenging German part in eurozone bailouts.
A man in a panda costume walks alongside a businessman in Tokyo.
China and other leading nations say they view the Fed’s move to buy up $600 billion in US Treasury bonds, on top of earlier purchases, as timed to put them on the defensive at the G20 summit in Seoul.
This weekend's G20 summit pits President Obama's stimulus efforts against European calls for austerity budgets in what is shaping up as an economic clash of civilizations.
The German parliament approved the country's $28 billion contribution to the Greek bailout package on Friday. Chancellor Angela Merkel shifted from initial opposition to paying Greece's debts to concern over economic fallout in the rest of Europe.
About 100 Communist Party supporters broke through the gates of the Acropolis, the city's chief ancient monument, and hung banners in Greek and English reading 'Peoples of Europe Rise Up.'