Mr Brown told reporters at his monthly press conference on February 18, soon after the nationalisation of the troubled lender, that a profit could be made from the business when financial markets recovered.
International Securities Exchange, one of the largest US options markets, on Friday became the largest shareholder in Direct Edge, an alternative equities trading platform.
Macquarie Airports (MAP) on Tuesday announced an overhaul of its balance sheet that will see the Australian fund selling A$1.5bn of European airport assets to fund a A$1bn share buy-back and help deleverage the company.
U.S. Securities and Exchange Commission Chairman Christopher Cox said in an interview that his agency will propose new rules aimed at curtailing manipulative short sales of stocks in the next few weeks.