Bank Managers Knew About Libor Fixing, Hayes Told Citigroup HR

Citigroup Inc. managers knew about Thomas Hayes’s attempts to manipulate benchmark interest rates, the trader said in a 2010 letter written days after he was fired by the U.S. bank.

The note, shown to jurors on the fifth day of Hayes’s fraud trial, was sent after Hayes was dismissed following an internal investigation found he had tried to manipulate Libor by making requests of brokers and traders to submit favorable rates.