Aug 10, 2011 4:09 PM by Stephanie Collins
(AP) - Dow closes down 520 points; S&P 500 and Nasdaq down more than 4 percent.
Stocks are finishing the day with sharp declines, as investors turn their attention back to the weak economy. As for yesterday's late-afternoon surge that saw the market finish with solid gains, investors and analysts say that was probably just a blip caused by computerized trading. An analyst says the focus now is on "the fundamentals" of the economy.