Wall Street rallies on Facebook and GDP; Amazon sinks late

The S&P 500 scored its biggest gain in more than a month on Thursday as Facebook led a tech rally and data showed the U.S. economy was on solid footing in the fourth quarter. The day's rebound pushed the S&P 500 back into positive territory for the week, but the index was still down 2.9 percent for the month. Facebook Inc (FB.O) shares jumped 14.1 percent to end at $61.08, hitting a lifetime high of $62.50 during the session and supporting both the S&P 500 and Nasdaq. Google Inc (GOOG) shares jumped 2.6 percent to $1,135.39, a day after Lenovo Group said it would buy the Internet search giant's Motorola handset division for $2.91 billion.

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