Yen surges 2 percent vs dollar as global worries deepen

By Patrick Graham LONDON (Reuters) - The yen jumped 2 percent to its strongest in 15 months against the dollar on Thursday, with another wave of capital flows into the traditional security of Japan raising expectations of official intervention to cool the currency's rise. A chaotic week on European and U.S. stock markets has sent investors scuttling for the perceived safety of the yen, upping its value against the dollar by almost 9 percent since Feb. 1. "We got to 8 a.m. this morning and it jus