• What the mortgage bubble was all about was big banks like Goldman Sachs taking big bundles of subprime mortgages that were lent out largely to low-income, highly risky borrowers, and applying this kind of magic-pixie-dust math to these bundles of securities and slapping AAA ratings on them.

    Matt Taibbi: What the mortgage bubble was all about was big banks like Goldman Sachs taking big bundles of subprime mortgages that were lent out largely to low-income, highly risky borrowers, and applying this kind of magic-pixie-dust math to these bundles of securities and slapping AAA ratings on them.