Facebook's opening value was valued at a monstrous $100 billion. One of the biggest in history. It was even bigger than companies like Google and Groupon. However share prices haven't been driving up as much as people thought they would ever since it went public, it was way over-hyped. But I can't see Facebook going downhill, with the amount of control they have in the social media market I'm sure they'll be able to drive their share prices up as they develop.