ATHENS (Dow Jones)-The National Bank of Greece (NBG), Greece's largest bank by lending and assets, said Monday it has secured a EUR4.7 billion repo line of funding using Greek bonds as collateral.

"We have raised EUR4.7 billion from international banks, using Greek government bonds as collateral. The duration of the [repurchase agreements] is for 12 months at especially competitive rates given current market conditions," National said in a statement.

Greek banks had been frozen out of wholesale interbank markets since the outbreak of the local sovereign crisis. And because their deposit base has been shrinking, they had become very reliant on the European Central Bank for liquidity.

National's move comes after Eurobank (EUROB.AT), the country's second largest bank by lending, staged a return to the interbank markets.

Analysts say National has best-in-class capital adequacy in light of its successful EUR1.9 billion capital raising and its plans to raise another EUR1 billion from a partial sale of its Turkish unit Finansbank.

"This development represents a substantial step in the effort of the Greek banking system to gradually restore access to international capital markets, for the benefit of the whole Greek economy," NBG added.

-By Nick Skrekas, Dow Jones Newswires; +30 210 2830685; nick.skrekas@dowjones.com