Health stocks help Wall Street limit losses as energy drags

Wall Street was little changed in late morning trading on Friday as a bounce in healthcare shares struggled to offset declines in energy and materials stocks. A bigger-than-expected drop in China's imports and exports in April pointed to weak demand in the world's second-biggest economy and weighed on materials stocks. "It seems like the shadow of higher rates and weakening economy doesn't help stocks and that's what we are seeing," said Mohannad Aama, managing director of Beam Capital in New Yo