 In fact, Paulson & Co. a hedge fund that wanted to bet against the investment had played a "significant role" in the selection, and the package of securities turned out to become "one of the worst-performing mortgage deals of the housing crisis" because "less than a year after the deal was completed, 100% of the bonds selected for Abacus had been downgraded".The particular synthetic CDO that the SEC's 2010 fraud suit charged Goldman with misleading investors with was called Abacus 2007-AC1.Unlike many of the Abacus securities, 2007-AC1 did not have Goldman Sachs as a short seller, in fact, Goldman Sachs lost money on the deal.