Separately, Korea Development Bank, which had been considering buying a stake in the New York firm, ended talks to purchase an interest. Shares of Lehman, which lost some 45% in Tuesday's session, were trading up 7% in early trading Wednesday. Elsewhere, Standard & Poor's said it would remove Fannie Mae undefined and Freddie Mac undefined from the S&P 500 index after the close of trading. The government over the weekend announced plans to seize the two mortgage giants, whose exposure to the credit and housing crises threatened the U.S. financial system. Further indicating worries, Keefe Bruyette launched a salvo of ratings downgrades at nine banks, including BB&T ( BBT ), Bank of America ( BAC ) and Fifth Third ( FITB ). Kansas Bankers Surety, a subsidiary of Berkshire Hathaway ( BRKA ), also stopped insuring bank deposits that exceed levels guaranteed by the government.