Yellen leaves US stocks mixed, Europe bounces higher

Federal Reserve chair Janet Yellen left US markets mixed with a warning of clouds on the economic horizon, but Europe rebounded while Asia sank again on fears of another banking crisis and global recession. The dollar perked up after Yellen said the Fed still expects gradual interest rate rises, but her concerns probably lowered the possibility of an increase in its next policy meeting in March. "Financial conditions in the United States have recently become less supportive of growth, with decli