3/25/2009

3/21/2009

Taibbi on the Financial Bottoming Out

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 — meaning it has close to zero credit risk.

Suddenly, thanks to this financial seal of approval, banks had a way to turn their shittiest mortgages and other financial waste into investment-grade paper and sell them to institutional investors like pensions and insurance companies, which were forced by regulators to keep their portfolios as safe as possible. Because CDOs offered higher rates of return than truly safe products like Treasury bills, it was a win-win: Banks made a fortune selling CDOs, and big investors made much more holding them.