US STOCKS-Wall St slips on crude on last trading week of the year
* Exxon, Chevron biggest drags on S&P 500, Dow
* Valeant slumps as CEO goes on medical leave
* Disney up as latest Star Wars rakes in $1 bln
* Indexes down: Dow 0.49 pct, S&P 0.48 pct, Nasdaq 0.40 pct (Updates to open)
By Abhiram Nandakumar
Dec 28 (Reuters) - Wall Street began the last trading week of the year in the red, dragged down by energy stocks, as oil prices resumed a slide brought on by a global oversupply.
All 10 major S&P 500 sectors were lower, led by the 0.63 percent fall in the energy sector. Exxon's shares were down 1.7 percent at $77.99, while Chevron was down 2.1 percent at $90.12. The stocks were among the biggest drags on the S&P 500 and the Dow.
"The 3 percent dive in crude oil this morning shows you that the sellers are still in control of the energy market and that's leading jitters on Wall Street, coupled with just normal digestive action after last week's strong gains," said Adam Sarhan, chief executive of Sarhan Capital in New York.
All three major indexes posted their best weeks since mid-November last week, rising about 2.5 percent, led by a short-lived surge in energy stocks. Continuación...