Stocks hit two-year lows on commodity pressure; U.S. biotechs bounce

By Chuck Mikolajczak NEW YORK (Reuters) - Global equity markets touched a two-year low on Tuesday as the outlook for raw materials prices and emerging markets remained soft, while U.S. biotech shares attempted to stabilize after their recent selloff. U.S. stocks were higher after suffering their worst drop in nearly a month in the prior session, boosted by the gains in biotechs. "A lot of traders are hoping that this is the end of the pullback," said Gordon Charlop, a managing director at Rosenb