US STOCKS-Wall St pulls back after recent rally
* S&P healthcare sector's gains help limit losses
* Virgin America surges on buyout deal with Alaska Air
* Indexes down: Dow 0.3 pct, S&P 0.3 pct, Nasdaq 0.5 pct (Updates close with Allergan down after the bell, Q1 earnings estimate)
By Caroline Valetkevitch
April 4 (Reuters) - U.S. stocks ended weaker on Monday, pulling back from a recent rally that took them to new 2016 highs, as losses in commodity-related and industrial shares offset gains in healthcare.
The S&P materials sector fell 1 percent after copper prices touched their lowest in a month, while energy shares slipped with oil prices.
"What we're seeing is some classic bullish fatigue setting in. Oil and other commodities are all in pullback mode ... and investors are very focused on commodities because they led on the way up," said Adam Sarhan, chief executive of Sarhan Capital in New York.
Investors also are bracing for a weak first-quarter profit season, with earnings for S&P 500 companies projected to have fallen 7.1 percent from the year-ago first quarter, according to Thomson Reuters data.
The Dow Jones industrial average closed down 55.75 points, or 0.31 percent, to 17,737, the S&P 500 lost 6.65 points, or 0.32 percent, to 2,066.13 and the Nasdaq Composite dropped 22.75 points, or 0.46 percent, to 4,891.80. Continuación...