Wall St higher as rate hike concerns ease

By Yashaswini SwamynathanREUTERS – Wall Street was higher on Wednesday as investors took comfort from Federal Reserve Chair Janet Yellen’s comments that the central bank should tread cautiously on raising rates this year. Apple’s 2 percent rise propped up all three major indexes and helped the S&P 500 extend gains for the year. Yellen, who made her first remarks since the Fed held steady on rates earlier this month, said inflation in the United States had not yet reached su