Barclays and the LIBOR Scandal. Clayton Rose, May 2013, Case. "In June of 2012, Barclays plc admitted that it had manipulated LIBOR—a benchmark interest rate that was fundamental to the operation of international financial markets and that was the basis for trillions of dollars of financial transactions. Between 2005 and 2009 Barclays, one of the world's largest and most important banks, manipulated LIBOR to gain profits and/or limit losses from derivative trades. In addition, between 2007 and 2009 the firm had made dishonestly low LIBOR submission rates to dampen market speculation and negative media comments about the firm's viability during the ..." May require purchase or user account.