"Markets demand more credibility in the implementation of economic policy," the Federation of Hellenic Enterprises said in a monthly bulletin on economic developments released on Monday.

"Market trends, referring to the Greek stock exchange and the state bond market, or the weak upgrade of the country by credit rating agencies, is not consistent with a completion of the third programme and the possible access of the state, enterprises and banks to borrowing from abroad on better terms for the country, SEV said in the report.

The Federation noted that Greece needs to be very careful in the handling of agreements made with its creditors, "otherwise, combined with political tension and possible inconsistencies in the implementation of economic policy, prospects for a sustainable growth course will prove rather limited".