UPDATE: Facebook's $16 billion IPO one of the world's largest

Thursday, May 17, 2012 | 6:20 p.m. CDT; updated 6:34 p.m. CDT, Thursday, May 17, 2012

NEW YORK — Facebook's initial public offering of stock is shaping up to be one of the largest ever. The world's definitive online social network is raising at least $16 billion for the company and its early investors in a transaction that values Facebook at $104 billion.