US STOCKS-Wall St falls; energy shares dragged down further by oil
* Alcoa shares up after the bell
* NPS Pharma climbs; to be acquired by Shire
* Energy shares fall as oil selloff continues
* Indexes off: Dow 0.5 pct, S&P 0.8 pct, Nasdaq 0.8 pct (Updates to close)
By Caroline Valetkevitch
NEW YORK, Jan 12 (Reuters) - U.S. stocks fell for a second straight session on Monday, led by another sharp decline in energy shares as oil prices tumbled about 5 percent and concern grew ahead of corporate earnings season.
Oil prices extended their recent free-fall after Goldman Sachs slashed its short-term price forecasts and Gulf producers showed no signs of curbing output.
The S&P energy index dropped 2.8 percent, the biggest drag on the S&P 500. Brent fell 5.3 percent to settle at $47.43 and U.S. crude dropped 4.7 percent to $46.07.
"Crude oil is heading down again here. That's sent us into negative territory again. There's a lot of confusion and concern about the impact of oil prices," said Tim Ghriskey, chief investment officer of Solaris Group in Bedford Hills, New York. Continuación...