The quality of retail loans of Hungarian banks deteriorated sharply further in the first three months of 2013, figures of the National Bank of Hungary released on Wednesday show. The ratio of non-performing loans (NPLs) rose to 18.0% of the total portfolio at the end of March from 16.3% at the end of December. The NPL ratio has risen for the second quarter in a row, and was the second highest after it peaked at 18.3% at the end of last June. The ratio dropped to 15.8% by the end of September before rising slightly again in the fourth quarter of 2012. The retail loan stock rose in the first three months in the first one recorded since the third quarter of 2011, but practically all the increase was due to the weakening forint.