Yen hits 3-1/2 month highs on BOJ optimism By: CNBC.com News May 21, 2014 at 09:05 AM EDT The yen rose to a 3-1/2 month high against the dollar and euro on Wednesday, buoyed by optimistic comments from Bank of Japan chief Haruhiko Kuroda. Read More >> Related Stocks: Barclays Plc ADR