 The bubble continued to grow through 2005 and 2006, but by 2007 began to deflate.In one later widely publicized deal, Goldman Sachs put together a "synthetic" collateralized debt obligation (CDO) called ABACUS 2007-AC1 where investors (such as the European banks IKB Deutsche Industrie, and ABN Amro, and the New York insurance company ACA Financial Guaranty) provided the "long" by taking the risk from subprime mortgage bonds, effectively providing Paulson with insurance in the case of subprime mortgage default.The deal was made in late April 2007 and several months later the bonds began to default and Paulson eventually made about $1 billion total from those investors' losses.