Rate differentials could remain surprisingly positive.
Federal Reserve officials are clearly signalling increasing discomfort with the level of restrictiveness implied in real policy rates. If all else were equal, the dollar would come under sustained selling pressure in the months ahead. But exchange rates have already moved dramatically: Hedge funds and other large speculators are holding a net short position against the dollar for the first time since September, and the greenback has fallen more than 4 percent from its October highs as markets have turned optimistic on returns outside the United States. And all else isn’t equal: Although inflation is headed in the same direction...