Too Big to Fail: The Inside Story of How Wall Street and Washington Fought to Save the Financial System from Crisis — and Themselves

by Andrew Ross Sorkin

With BISTROs, a bank took a basket of hundreds of corporate loans on its books, calculated the risk of the loans defaulting, and then tried to minimize its exposure by creating a special-purpose vehicle and selling slices of it to investors. It was a seamless, if ominous, strategy. These bondlike investments were called insurance: JP Morgan was protected from the risk of the loans going bad, and investors were paid premiums for taking on the risk. Ultimately, Cassano passed on buying BISTROs from JP Morgan, but he was intrigued enough that he ordered his own quants to dissect it. Building computer models based on years of historical data on corporate bonds, they concluded that this new device—a credit default swap—seemed foolproof. The odds of a wave of defaults occurring simultaneously were remote, short of another Great Depression. So, absent a catastrophe of that magnitude, the holders of the swap could expect to receive millions of dollars in premiums a year. It was like free money.