A street artist performs in downtown Milan, Italy, Thursday, April 12, 2012. Stock markets seesawed Thursday as investors sought to divine whether the U.S. economy is slowing or growing and whether Europe's debt crisis is flaring up again. An early morning rally on an upbeat U.S. economic survey gave way to a slide spurred by a disappointing Italian bond auction. By late afternoon, though, stocks were up solidly again, following American market gains led by a study that showed that Hewlett-Packard shipped more personal computers than expected in the first part of the year. In recent days, fears that Spain and Italy are struggling to manage their debts and could need some form of rescue has roiled markets. Both countries have seen the yields, or interest rates, on their bonds rise on the secondary market, where they trade openly after they're issued. That means investors are demanding bigger returns to lend to them. (AP Photo/Luca Bruno)