US STOCKS-Wall St opens lower as Fed meet approaches
* Oil prices fall after Goldman Sachs cuts forecast
* S&P poised for biggest weekly gain since July
* Zumiez falls after cutting third-qtr forecast
* Indexes down: Dow 0.23 pct, S&P 0.27 pct, Nasdaq 0.30 pct (Updates to open)
By Tanya Agrawal
Sept 11 (Reuters) - Wall Street opened lower on Friday as jittery investors took to the sidelines ahead of a crucial U.S. Federal Reserve meeting next week, when the central bank decides on an interest rate hike.
However, the S&P 500 was poised for its biggest weekly gain since July despite the recent volatility that has rocked the global financial market.
Stocks have been volatile for the past few weeks since China devalued its currency in August and the impact of a slowdown in the region on global growth rattled investors. The S&P 500 has had moves of at least 1 percent in 11 sessions since Aug. 20.
Investors pulled another $15.9 billion from U.S. equities over the past week as they sought safety in government bond funds, Bank of America Merrill Lynch said. Continuación...