[macker]

Originally Posted by Cowperson

Bubbles typically involve leverage, some way, some how, and often revolve around an unregulated or loosely regulated loophole where no one is watching or able to say "no."

Some guy gets a bright idea, everyone piles in, it all starts to look like the norm (this time its different) and then, kerpow, right in the kisser when it explodes.

About every seven to ten years.

All of this has happened before, and all of this will happen again. Not exactly the same way . . . .

Cowperson

This book changed the way I look at bubbles :
http://press.princeton.edu/titles/8973.html