There has been no significant contagion to the rest of the euro zone despite Greece's struggle to secure a new cash-for-reforms deal with its international creditors, according to a report by the global ratings agency Moody's on Thursday.

The leaders of Germany and France agreed with Prime Minister Alexis Tsipras on Wednesday that negotiations between Athens and its creditors must be intensified to reach a deal to avert a Greek default, but there was no sign of a breakthrough.

"Despite uncertainty about the outcome of the negotiations in Greece, financial fragmentation in the rest of the euro area has diminished further, a positive sign of resilience of the financial sector," Moody's analyst Antoni Garre said.