Excellent and Interesting Reading!
Utterly fascinating look at the business of risk-assessment in CDO (collateralized debt obligations) creation during the run up to the current disaster. (Can't publish content from Wired.) The mathematics behind the fall.
Recipe for Disaster: The Formula That Killed Wall Street
Also there ... Here's What Killed Your 401K!
Also we must not forget this formula: G+R+E+E+D
"I believe that banking institutions are more dangerous to our liberties than standing armies." ~ Thomas Jefferson