. . . . . . . . . . . . . . . "Rules"@en . . . . "Wall Street and the financial crisis : the role of credit rating agencies : hearing before the Permanent Subcommittee on Investigations of the Committee on Homeland Security and Governmental Affairs, United States Senate, One Hundred Eleventh Congress, second session, April 23, 2010"@en . . . . "Wall Street and the financial crisis the role of credit rating agencies : hearing before the Permanent Subcommittee on Investigations of the Committee on Homeland Security and Governmental Affairs, United States Senate, One Hundred Eleventh Congress, second session, April 23, 2010"@en . . . "2008 - 2009" . .