Article 50the "fairvalue" refers to the amount, at which both parties to a transaction who are familiar withtheconditionexchange their assetsorclear off their debts under fair conditions.
His message was clear: The euro zone may cut off funding to the Greek government, forcing it to default on its debts and its obligation to its own citizens, but so long as it took steps to ensure Greek banks remain technically solvent, Greece could stay in the euro indefinitely.