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John Cryan, chief executive officer of Deutsche Bank AG, reacts during a business conference at the Economic Council in Berlin, Germany, on Tuesday, June 21, 2016. German investor confidence unexpectedly improved in June after polls on Britain's future in the European Union showed the 'Remain' camp gaining ground. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

John Cryan, chief executive officer of Deutsche Bank AG, reacts during a business conference at the Economic Council in Berlin, Germany, on Tuesday, June 21, 2016. German investor confidence unexpectedly improved in June after polls on Britain's future in the European Union showed the 'Remain' camp gaining ground. Photographer: Krisztian Bocsi/Bloomberg via Getty Images