Fool's Gold: How Unrestrained Greed Corrupted

I've done a fair amount of reading about the Panic of 2008, and Gillian Tett's "Fools Gold" explains the exotic investment instruments at the heart of the panic better than any other work I've read. A group of derivatives traders at J.P. Morgan created commoditized credit default swaps in the early 1990s as a way to move risk off the company's books, freeing up capital for lending and investment that otherwise would need to be held in reserve. Morgan made payments to AIG, which assumed the risk that Morgan's assets would go into default. Derivatives traders at other firms began assembling securities backed by subprime mortgages, trying to put together instruments that would be just risky enough to obtain returns but safe enough to obtain AAA ratings. They then paid AIG to assume the risk of the mortgages underlying those securities going bad. However, many institutions kept what they thought were the least risky of these mortgages on their own books, as they could not obtain much in the way of returns on the securities that they would back. The whole thing was unregulated by government, and the ratings agencies were easily bamboozled into turning poo into gold (as it turned out). As the cruddy mortgages went bad, AIG began to take on water. When the less risky mortgages went bad, the financial institutions themselves sank.