US STOCKS-Wall St set to open lower as crude oil slips
* Brent crude falls about 2.4 pct
* Valeant slumps as CEO goes on medical leave
* S&P marginally up for the year
* Futures down: Dow 83 pts, S&P 9 pts, Nasdaq 12 pts (Adds details, comment; updates prices)
By Abhiram Nandakumar
Dec 28 (Reuters) - U.S. stock indexes were set to open lower on the first day of the last trading week of the year as oil prices continued to fall due to oversupply.
Brent crude was down 2.4 percent and were hovering near 11-year lows. Exxon's shares were down 1.5 percent at $78.14, while Chevron was down 1.7 percent at $90.47 in premarket trading.
"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 indexes posted their best weeks since mid-November last week, rising about 2.5 percent, led by a surge in energy stocks. Continuación...