BusinessNon-performing loans – A time bomb in Greek banks04:50This browser does not support the video element.Business07/28/2015July 28, 2015Liquidity isn't the only problem for Greek banks. Non-performing loans are also piling up on the books. In late 2014, over 34 percent of loans in Greece were in arrears. Meanwhile that number could be higher than 50 percent.Copy linkAdvertisement