US STOCKS-Wall St climbs, S&P 500 posts best week since July
* Oil prices fall after Goldman Sachs cuts forecast
* S&P 500 posts biggest weekly gain since July
* Dow up 0.6 pct, S&P up 0.5 pct, Nasdaq up 0.5 pct (Updates with volume, details on weekly gains)
By Caroline Valetkevitch
Sept 11 (Reuters) - U.S. stocks rose on Friday and the S&P 500 posted its biggest weekly gain since July as investors weighed whether the Federal Reserve will raise interest rates next week.
Energy shares dropped, however, after Goldman Sachs cut its oil price forecast through next year.
Eight of the 10 S&P 500 sectors closed higher, led by gains in utilities, which tend to rise as bond yields fall. The index ended up 0.8 percent, while 10-year U.S. Treasury note yields dipped.
Investors are awaiting next week's Fed monetary policy meeting and news on whether it will raise benchmark U.S. rates for the first time in almost a decade.
"It's really Fed watch. That's what traders are waiting for," said Tim Ghriskey, chief investment officer of Solaris Group in Bedford Hills, New York. Continuación...