Worries about a capital shortfall at Commerzbank, Germany's second-largest bank, have led to talks with the German government about possible state aid, people familiar with the matter said. Commerzbank, which has a market value of around 6 billion euros, has been asked by the European Banking Authority (EBA) to outline plans by January 20 on how to find an extra 5.3 billion euros in capital by mid-2012. The prospect of indirect state aid through a new bailout fund set to be established next year drove up Commerzbank shares on Wednesday.