Wall Street ends flat for year despite a big volatile year

Xinhua, December 31, 2011
US-NEW YORK-NY STOCK EXCHANGE

Trader Peter Tuchman wearing "2012" glasses celebrates as the bell rings to end the last trading day of 2011 on the main trading floor of the New York Stock Exchange in New York Dec. 30, 2011. [Xinhua/Shen Hong]
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