CONSIDERING DOWNGRADES: Moody's Investors Service says it may lower the ratings of some of the world's largest banks and securities firms, because their long-term prospects for profitability and growth are shrinking.

TOP U.S. BANKS ON LIST: The ratings for Citigroup, Bank of America, Goldman Sachs, JPMorgan Chase, the Royal Bank of Canada and Morgan Stanley are under review.

GLOBAL COMPANIES: Also being reviewed are Credit Suisse, Macquarie, Nomura, UBS, Barclays, BNP Paribas, Credit Agricole, Deutsche Bank, HSBC, Royal Bank of Scotland and Societe Generale. Nine of these are among the 114 European banks Moody's is reviewing.