This is an interesting article from Wired the science mag. Although looking at the only graphic in the article I am not certain their metric is doing what the article claims that it is capable of doing. If you look at the graphic it began its move towards zero (the crash zone) in 2003 and the market continued to climb for another five years.
I will have to dig out the original and see if the author of this article has simply grabbed the wrong graphic.
this article underlines the folly of ‘fund management products’ that copy each other through buying the classic ‘no brainer’ portfolio: bhp, cba, anz, rio, et al