SEC bans short-selling Agency puts temporary halt to trading practice that 'threatens investors and capital markets' for 799 financial companies. <a href="http://money.cnn.com/2008/09/19/news/economy/sec_short_selling/index.htm" target="_blank">http://money.cnn.com/2008/09/19/news/economy/sec_short_selling/index.htm</a>