Yen posts biggest weekly gain since 2008, stocks slip

By Herbert Lash NEW YORK (Reuters) - The yen hit an 18-month high on Friday as investors bet the Bank of Japan might be done adding stimulus to the economy, while stocks in Europe and on Wall Street headed lower as earnings disappointed. The yen posted its biggest weekly gain since the 2008 financial crisis, also spurred by a weak reading of U.S. economic growth in the first quarter on Thursday and the Federal Reserve's cautious tone this week. The yen has gained 3 percent since Thursday when th