Europe's blue-chips warn on euro strength By: CNBC.com News April 24, 2014 at 06:58 AM EDT Some of the biggest names in European business have further complicated the dilemma currently facing Mario Draghi, the president of the European Central Bank. Read More >> Related Stocks: Akzo Nobel NV # ADR Bank of New York Mellon Koninklijke Philips Electronics ADR SAP Ag ADR