BERLIN (Reuters) – The European Central Bank will have to reduce its bond holdings in the foreseeable future and the next ECB meetings must send out clear signals that inflation will be countered, Bundesbank President Joachim Nagel said on Friday. “We must implement our monetary policy robustly. In the foreseeable future, the Eurosystem will also have to reduce its bond holdings,” Nagel said in a interview with newspaper Sueddeutsche Zeitung . Nagel said Germany’s economic output will probably see a slight decline in economic output as early as the third quarter this year which will likely int…