Update throughout the day.
China GDP grew 13% in December (CNBC)
Goldman Sachs (NYSE:GS) may move its operations out of London (The Telegraph)
Apple (NASDAQ:AAPL) is buying online ad firm Quattro for $275 million (AllThingsD)
Public pension funds may be short as much as $2 trillion to fulfill their obligations (FT)
Douglas A. McIntyre