Stocks sank deeper into the red in early afternoon trading as disappointing housing and consumer income data weighed. The Nasdaq slumped 2.4%, the S&P 500 2% and the Dow Jones industrial average 1.5%. Trade had picked up and volume was running higher across the board in the stock market today vs. the same time Friday. Medical stocks continued to bleed heavily, with hospitals, biotechs and generic drug makers suffering big declines.