> Net loss - GAAP net loss was $511 million for the fourth quarter of 2013 compared to a net loss of $9 million in the same period last year. The company's Q4 GAAP net loss included $521 million of stock-based compensation expense, of which $406 million was for restricted stock units previously granted to employees, for which no expense had been recognized, until the effective date of our initial public offering in accordance with GAAP.
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