Greek Lenders National Bank (National Bank) and Eurobank face nationalisation following the announcement that the planned merger of the two banks has been halted.
National Bank bought 84.3% of Eurobank in February 2013 with a view to absorb the bank.
Shares of both banks fell as the banks face nationalisation.
The central bank in Greece has been told that the two banks are unlikely to sell enough shares, 10% of their share offerings, to meet their capital needs.
The two bank’s boards will meet separately on Tuesday to discuss their recapitalisation.