The world's largest internet social network, Facebook is preparing for an initial public stock offering next year, Reuters has reported, citing a source familiar with the matter. Facebook is exploring raising $10 billion, a newspaper said on Monday. It hopes the offering will value the company at more than $100bn. Facebook's chief financial officer, David Ebersman, had discussed a public float with Silicon Valley bankers but founder and CEO Mark Zuckerberg had not decided on any terms and his plans could change, the sources said.