Wall Street rallies in volatile session after ECB measures

By Ryan Vlastelica NEW YORK (Reuters) – U.S. stocks rallied in volatile trading on Thursday after the European Central Bank announced expanded measures to stimulate the region's sagging economy, as expected. The ECB will buy 60 billion euros worth of assets per month, an amount that was more than expected, in a program that will last through September 2016. "When you have every central bank in the world trying to stimulate the global economy, that's a tough thing for asset prices to fight against," said Wayne Kaufman, chief market analyst at Phoenix Financial Services in New York.