The HSBC Holdings Plc logo is displayed on top of the company's headquarters in Hong Kong, China, on Friday, July 20, 2012. Traders at Deutsche Bank AG, HSBC Holdings Plc, Societe Generale SA and Credit Agricole SA are under investigation for interest-rate manipulation in a global probe that led to a record fine for Barclays Plc last month, a person with knowledge of the matter said. Photographer: Jerome Favre/Bloomberg via Getty Images