US STOCKS-Wall Street ends higher after bounce in oil prices
* Energy companies push stocks to higher close
* Norfolk Southern gives weak outlook, shares fall
* Expectations low as earnings season picks up
* Dow up 0.33 pct, S&P up 0.16, Nasdaq down 0.22 pct (Updates to close)
By Noel Randewich
NEW YORK, April 14 (Reuters) - The Dow and S&P 500 ended higher on Tuesday, helped by energy stocks and March-quarter earnings reports that topped modest expectations following worries about a strong dollar.
Shares of Exxon Mobil, Chevron and other energy companies followed crude higher after a forecast that U.S. shale oil output in May would record its first monthly decline in more than four years. The S&P 500 energy index jumped 1.77 percent.
Norfolk Southern Corp dropped 4.18 percent to $100.49 a day after it forecast a surprise drop in its first-quarter earnings and revenue.
A strong dollar, cheap oil and poor weather in the eastern United States in recent months have investors bracing for a difficult March-quarter earnings season. Continuación...