US STOCKS-Dow, S&P 500 end higher in volatile trade By: Reuters: Company News September 29, 2011 at 16:32 PM EDT * Dow up 1.3 pct, S&P up 0.8 pct, Nasdaq down 0.4 pct Read More >> Related Stocks: Amazon.com Baidu.com SP ADR Netflix Standard & Poors 500 Yahoo