"On September 21, 2008, Goldman Sachs and Morgan Stanley, the last two major investment banks in the United States, both confirmed that they would become traditional bank holding companies.The Federal Reserve's approval of their bid to become banks ended the business model of an independent securities firm, 75 years after Congress separated them from deposit-taking lenders, and capped weeks of chaos that sent Lehman Brothers into bankruptcy and led to the rushed sale of Merrill Lynch to Bank of America Corp. On September 23, 2008, Berkshire Hathaway agreed to purchase $5 billion in Goldman's preferred stock, and also received warrants to buy another $5 billion in Goldman's common stock within five years.