Goldman Sachs executives expect to receive subpoenas in the next few days from federal prosecutors seeking more information about the securities firm's mortgage-related business, according to Liz Rappaport and Jean Eaglesham of the Wall Street Journal. At first glance, most people will probably assume that this is just another investigation into alleged conflicts of interest and allegedly misleading disclosures to clients by Goldman's credit traders. The same sort of thing that got Goldman in trouble with the Abacus CDO for which Goldman eventually paid a $500 million fine.