More investors expect the euro zone to break up than at any other time since the Cypriot bailout crisis in March 2013.

The Euro Break-up Index, which is calculated by German research group Sentix, reached a two-year high of 38 percent in February.

Although Greece eventually singed a four month extension to its current bailout deal - the mood music has remained poor as finance ministers ready themselves for coming rounds of negotiations.

The index polled investors between February 26th and 28th - after the extension deal had been agreed.

Sentix’s chief Sebastian Wanke says: "Despite the solution which was found last week for Greece even more investors expect the Mediterranean country to leave the euro soon."

Throughout the often heated negotiating period, all parties involved in the debt deal maintained that Greece will stay in the euro zone.

While a deal has been reached, there are growing concerns as the Eurogroup waits for the Greeks to flesh-out their reform proposals.

Guardian reports that the unveiling of major reform proposals has been delayed until after the Eurogroup meeting in Brussels on Monday.

Angela Merkel said again yesterday that she hopes that Greece will remain part of the monetary union.