Dollar rampage spurs forex interventions, talk of big G7 move

LONDON (Reuters) - From Brazil to Norway, policymakers are leaping to defend currencies against the onslaught of the dollar which scaled three-year peaks on Thursday, raising speculation that a joint move by the world's biggest central banks may be in the offing.A global stampede for dollar funding drove currencies across the world to multi-year or record lows against the greenback. Some relief came after the U.S. Federal Reserve opened $450 billion in swap lines to several central banks but the..