sentences:  The issue of the increasing TARGET balances was brought to public attention for the first time in early 2011 by Hans-Werner Sinn, president of the Munich-based Ifo Institute for Economic Research.In an article in "Wirtschaftswoche", he drew attention to the enormous increase in TARGET claims held by Germany's Bundesbank, from €5 billion at the end of 2006 to €326 billion at the end of 2010, and to the attendant liability risk.In the German daily "Süddeutsche Zeitung" he put the entire volume of the TARGET liabilities of Greece, Ireland, Portugal, and Spain at €340 billion at the end of February 2011.