(Reuters) - German Finance Minister Wolfgang Schaeuble renewed his criticism of the U.S. Federal Reserve's move to buy $600 billion worth of government bonds, saying it undermined U.S. credibility and created uncertainty, according to a German magazine. "I have great doubts about whether it makes sense to pump unlimited amounts of money into the markets," Schaeuble told Der Spiegel news magazine. "There is no shortage of liquidity in the U.S. economy. I can't see the economic argument for this move." On Friday he said U.S. monetary policy was "clueless." Complete article-: http://www.reuters.com/article/idUSTRE6A50VN20101106?utm