International pressure on Greece has increased ahead of crisis talks later between its prime minister and the leaders of Germany and France.
George Papandreou's surprise decision to call a referendum on the eurozone rescue plan agreed last week continued to unsettle financial markets.
And leaders heading for Thursday's G20 summit in France urged the debt-laden eurozone to put its house in order.
German Chancellor Angela Merkel said she wanted "clarity" from Greece.
Host Lisa Mullins speaks with European Economics correspondent for Dow Jones and Wall Street Journal, Matina Stevis.