Hayes Accused Boss of Misconduct After Being Fired by Citigroup

Tom Hayes, a former trader at banks including UBS Group AG and Citigroup Inc., arrives for his trial at Southwark Crown Court in London, on June 3, 2015.

Photographer: Simon Dawson/Bloomberg
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The day after Thomas Hayes was dismissed by Citigroup Inc. for rigging Libor, the derivatives trader fired off an e-mail accusing his boss of manipulating similar benchmarks.

Hayes, who is on trial in London, said that Brian McCappin, head of Citigroup’s investment bank in Japan, asked traders to fiddle with the Tokyo interbank offered rate, according to an e-mail shown to jurors by prosecutors Monday.