US STOCKS-Wall St falls as energy weakness drags on
* Earnings season begins this week
* NPS Pharma climbs; to be acquired by Shire
* Energy shares fall as oil tumbles
* Indexes off: Dow 0.7 pct, S&P 0.9 pct, Nasdaq 0.9 pct (Updates to late afternoon trading, changes byline)
By Caroline Valetkevitch
NEW YORK, Jan 12 (Reuters) - U.S. stocks fell on Monday, led by a decline in energy shares as oil prices tumbled about 5 percent and concern grew ahead of the start of corporate earnings season.
Oil prices extended their recent free-fall, with Brent falling 5.3 percent to settle at $47.43 and U.S. crude dropping 4.7 percent to $46.07. Goldman Sachs slashed its short-term price forecasts and Gulf producers showed no signs of curbing output.
The S&P energy index, down 3.1 percent, was the day's worst-performing S&P 500 sector.
"It's crude-related. That's caused more selling. There's a lot of confusion and concern about the impact of energy prices," said Tim Ghriskey, chief investment officer of Solaris Group in Bedford Hills, New York. Continuación...