There are market rumors of merger talk between Morgan Stanley and Goldman Sach. While Bank of America's purchase of Merrill Lynch is estimated around USD 50 bln, no details have been leaked about a potential merger between American investment banks Morgan Stanley and Goldman Sach. Meanwhile, U.K.'s HBOS has seen its shares drop down 27% on the day on concerns over funding costs, with HBOS extra sensitive to intrabank market disruption.