" There are a lot of really crappy bonds in these CDOs,’” said Charlie. They didn’t realize yet that the bonds inside their CDOs were actually credit default swaps on the bonds, and so their CDOs weren’t ordinary CDOs but synthetic CDOs, or that the bonds on which the swaps were based had been handpicked by Mike Burry and Steve Eisman and others betting against the market. In many ways, they were still innocents. "

― Michael Lewis , The Big Short: Inside the Doomsday Machine