If you had invested $100 in USA stocks in year 2000, their value in year 2009 is $100 only. That is a profit return of 0%. Have a look at this graph/chart.
http://seekingalpha.com/article/179444-gold-best-return-for-the-decade
http://seekingalpha.com/article/179444-gold-best-return-for-the-decade