US STOCKS-S&P 500 slips back into the red for the year
* All three indexes lower
* Apple weighs on S&P 500, Nasdaq; Boeing drags Dow
* Energy sector worst performer on S&P 500 for year
* Indexes down: Dow 0.69 pct, S&P 0.62 pct, Nasdaq 0.64 pct (Adds details, changes comment, updates prices)
By Abhiram Nandakumar
Dec 31 (Reuters) - Wall Street was lower on Thursday, with the S&P 500 set to end the year with a small loss as energy stocks took a hit from a plunge in crude oil.
Trading volumes are expected to be thin on the last day of the year, with traders closing off their positions.
The rout in commodities has sent markets across the world reeling as oil prices floundered under an unprecedented global glut that may take another year to clear.
The S&P 500 was down 0.53 percent for the year, while the Dow Jones industrial average was down 2 percent. Only the Nasdaq Composite was in positive turf, having risen 6.2 percent. Continuación...