Signs sit outside branches of a Lloyds TSB bank, part of the Lloyds Banking Group Plc, a Barclays Plc bank, a NatWest bank, part of the Royal Bank of Scotland Group Plc (RBS), and a HSBC Holdings Plc bank in Staines, U.K., on Tuesday, Dec. 18, 2012. The European Union is leading a probe into Libor rigging that could see global banks fined as much as 10 percent of their annual revenue. Photographer: Chris Ratcliffe/Bloomberg via Getty Images
