Wall St. Week Ahead: Dollar's sudden weakness could help U.S. profit picture

Stock investors could have at least one less worry in the next earnings period: the suddenly limp U.S. dollar. The greenback, whose strong rally after the Nov. 8 U.S. election hit profits at many U.S. multinationals in the fourth quarter, has had a sharp reversal since the start of the year. Fourth-quarter results, even with the dollar's drag, are mostly beating Wall Street's expectations and helping provide a buffer to some of the uncertainties facing investors, including the new U.S. president