million in one day. The bubble's subsequent collapse was considered to be a central feature of the financial crisis of 2007–2010. The bank was contracted by the United States Treasury in August 2008 to advise the government on potential rescue strategies for Fannie Mae and Freddie Mac. Within days, Morgan Stanley itself was at risk of failure, with rapidly changing prospects, regulatory model and ownership stakes over the course of four weeks from mid-September to mid-October 2008. The bank Morgan Stanley was reported to have lost over 80% of its market value between 2007 and 2008 during the financial crisis. On September 17, 2008, the British evening-news analysis program Newsnight reported that Morgan Stanley was facing difficulties after a 42% slide in its share price in two days. CEO John J. Mack wrote in a memo to staff "we're in the midst of a market controlled by fear and rumours and short-sellers are driving our stock down." By September 19, 2008, the share price had slid 57% in four days, and the company was said to have explored merger possibilities with CITIC, Wachovia, HSBC, Standard Chartered, Banco Santander and Nomura. At one point, Hank Paulson offered Morgan Stanley to JPMorgan Chase at no cost, but JPMorgan's Jamie Dimon refused the offer. Morgan Stanley and Goldman Sachs, the last two major investment banks in the US, both announced on September 22, 2008, that they would become traditional bank holding companies regulated by the Federal Reserve. The Federal Reserve's approval of their bid to become banks ended the ascendancy of securities firms, 75 years after Congress separated them from deposit-taking lenders, and capped weeks of chaos that sent Lehman Brothers Holdings Inc. into bankruptcy and led to the rushed sale of Merrill Lynch & Co. to Bank of America Corp. MUFG Bank, Japan's largest bank, invested $9 billion in a direct purchase of a 21% ownership stake in Morgan Stanley on September 29, 2008. The payment from MUFG was supposed to be wired electronically; however, because it needed to be made on an emergency basis on Columbus Day when banks were closed in the US, MUFG cut a US$9 billion physical check, the largest amount written via physical check at the time. The physical check was accepted by Robert A. Kindler, Global Head of Mergers and Acquisitions and Vice Chairman of Morgan Stanley, at the offices of Wachtell Lipton. Concerns over the