Already expected to be the largest-ever initial public offering for an Internet company, Facebook is making its IPO even bigger.

The world's largest online social network on Tuesday increased the planned price range for its stock to $34 to $38 per share in a filing with the Securities and Exchange Commission. That's up from its previous range of $28 to $35. At the upper limit of $38, the sale would raise about $12.8 billion. Read more...