US STOCKS-Wall St ends worst quarter in four years with a rally
* Stocks bounce after market sell-off
* Biotechnology closes up 4.5 pct but still down for Sept
* Sept private sector jobs data better than expected
* Dow, S&P and Nasdaq down for the quarter
* Indexes up: Dow 0.98 pct, S&P 1.27 pct, Nasdaq 1.65 pct (Updates with market close, commentary, volume)
By Sinead Carew
Sept 30 (Reuters) - U.S. stocks closed sharply higher on Wednesday as investors sought bargains among beaten-down stocks and the recently battered biotechnology index bounced back on the last day of Wall Street's worst quarter since 2011.
For much of the third quarter, global markets were rocked by fears of slowing growth in China and uncertainty over timing for a U.S. Federal Reserve hike of interest rates. Biotech had a seven-day selloff kicked off by drug price regulation worries.
"I don't think there was a specific piece of news driving the market today. We got very oversold," said Brian Fenske, head of sales trading at ITG in New York. "When everybody gets bearish quickly, you tend to get these bounces." Continuación...