US STOCKS-Wall Street falls as oil prices drag
* Earnings season begins this week
* NPS Pharma climbs; to be acquired by Shire
* Foundation Medicine jumps; Roche to take majority stake
* Energy shares fall as oil tumbles
* Indexes off: Dow 0.46 pct, S&P 0.71 pct, Nasdaq 0.69 pct (Updates to late morning)
By Chuck Mikolajczak
NEW YORK, Jan 12 (Reuters) - U.S. stocks lost ground on Monday, extending a two-week decline for equities, as weakness in oil prices weighed on the energy sector ahead of the start of corporate earnings season.
Oil prices continued their downward march and were a drag on equities. Brent was down more than 5 percent to $47.44 and U.S. crude down 4.6 percent at $46.13, as Goldman Sachs slashed its short-term price forecasts and Gulf producers showed no signs of curbing output.
The S&P energy index was down 2.9 percent, easily the worst performer of the 10 major S&P sectors. Continuación...