The social network known as Facebook has officially signed its Initial Public Offering, authorized by Ernst & Young LLP as having shares of its common stock available to the world today. Facebook seeks to raise $5 billion USD, just about half of what analysts were expecting on the whole. In the filing, its apparent that Facebook's current cash, cash equivalents, and marketable securities totals in at $3,908,000,000 - that's a lot of bank. Similar numbers can be seen in working capital at $3,705,000,000 and total stockholders' equity at 4,899,000,000 - that being over 5 billion USD in pro form. Total assets, the biggest of the sets, sits at over 6 billion USD.