Davies points out the dire situation of Greece's banks as the negotiations are called off and Greece calls for a referendum on July 5, 2015. In the week before the referendum if Greeks take out the 60 euros a day that they are permitted to withdraw from banks, the banks may have barely enough cash for the 3.5 billion dollars needed to do this. Only the emergency funding line from the ECB stands between Greece and the collapse of its financial system, says Davies. He says full banking union with depositors insurance, resolution authority, and other changes are needed to protect weaker banks in the eurozone. Contagion effects could affect Portugal's Banco Commercial Portugues, Italy's Monte de Paschi, and Austria's Raiffieisen bank, says Davies.