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British trader Tom Hayes arrives at Southwark Crown court in London on July 27, 2015 as the trial over alleged rigging of the London Interbank Offered Rate (Libor) continues. A British trader who worked for UBS and Citigroup was accused on May 26 of being the greedy 'ringmaster' of a conspiracy to rig global interest rates at his trial. Britain's Serious Fraud Office (SFO) alleges that Tom Hayes was the leader of more than a dozen traders it says worked to rig the London Interbank Offered Rate (Libor) between 2006 and 2010. AFP PHOTO/Leon Neal (Photo credit should read LEON NEAL/AFP/Getty Images)

British trader Tom Hayes arrives at Southwark Crown court in London on July 27, 2015 as the trial over alleged rigging of the London Interbank Offered Rate (Libor) continues. A British trader who worked for UBS and Citigroup was accused on May 26 of being the greedy 'ringmaster' of a conspiracy to rig global interest rates at his trial. Britain's Serious Fraud Office (SFO) alleges that Tom Hayes was the leader of more than a dozen traders it says worked to rig the London Interbank Offered Rate (Libor) between 2006 and 2010.  AFP PHOTO/Leon Neal        (Photo credit should read LEON NEAL/AFP/Getty Images)