the Patient Zero of the global economic meltdown â was one Joseph Cassano, the head of a tiny, 400-person unit within the company called AIG Financial Products, or AIGFP. Cassano, a pudgy, balding Brooklyn College grad with beady eyes and way too much forehead, cut his teeth in the Eighties working for Mike Milken, the granddaddy of modern Wall Street debt alchemists. Milken, who pioneered the creative use of junk bonds, relied on messianic genius and a whole array of insider schemes to evade detection while wreaking financial disaster. Cassano, by contrast, was just a greedy little turd with a knack for selective accounting who ran his scam right out in the open, thanks to Washington's deregulation of the Wall Street casino. "It's all about the regulatory environment," says a government source involved with the AIG bailout. "These guys look for holes in the system, for ways they can do trades without government interference. Whatever is unregulated, all the action is going to pile into that."
The mess Cassano created had its roots in an investment boom fueled in part by a relatively new type of financial instrument called a collateralized-debt obligation. A CDO is like a box full of diced-up assets. They can be anything: mortgages, corporate loans, aircraft loans, credit-card loans, even other CDOs. So as X mortgage holder pays his bill, and Y corporate debtor pays his bill, and Z credit-card debtor pays his bill, money flows into the box.
The key idea behind a CDO is that there will always be at least some money in the box, regardless of how dicey the individual assets inside it are. No matter how you look at a single unemployed ex-con trying to pay the note on a six-bedroom house, he looks like a bad investment. But dump his loan in a box with a smorgasbord of auto loans, credit-card debt, corporate bonds and other crap, and you can be reasonably sure that somebody is going to pay up. Say $100 is supposed to come into the box every month. Even in an apocalypse, when $90 in payments might default, you'll still get $10. What the inventors of the CDO did is divide up the box into groups of investors and put that $10 into its own level, or "tranche." They then convinced ratings agencies like Moody's and S&P to give that top tranche the highest AAA rating â meaning it has close to zero credit risk.