U.S. stocks rallied on Thursday, moving the S&P 500 back in positive territory for 2011 ahead of the last trading day of the year, on more positive signals on the U.S. economy.
The S&P 500 edged above its 200-day moving average, a key measure of the market's long-term momentum, but scant volume increased volatility, and made the gains harder to trust.
Read the whole story at Yahoo!Finance.
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