Mark seemed to be having the best week ever last week, turning 28 last Monday, taking FB public this past Friday and getting hitched to longtime GF, Priscilla Chan this past Saturday. The Facebook IPO on Friday caused excitement in the financial community and raked Zuckeberg in a whooping $20+ billion dollars. Looks like the fun can only last so long as FB stock,as of today, trading lower without the full support of the of the company's underwriters. The Nasdaq did rise 1.2%. Analysts say investors are becoming extremely cautious about the stock after the frenzy on Friday. Don't fret for Mark or Facebook though, anything can change in the stock market!