Update throughout the day.

Google (NASDAQ:GOOG) will unveil its Nexus One handset today  (various)

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