Regulating financial holding companies and physical commodities : hearing before the Subcommittee on Financial Institutions and Consumer Protection of the Committee on Banking, Housing, and Urban Affairs, United States Senate, One Hundred Thirteenth Congress, second session, on examining nonfinancial activities currently being permitted under the Bank Holding Company Act and the economic impact of such activities on the physical commodity and energy markets as well as the safety and soundness of the nation's banking system, January 15, 2014.