Three former Barclays traders convicted in London Libor rigging trial

By Kirstin Ridley and Carolyn Cohn LONDON Reuters) - Three former Barclays traders have been found guilty by a London jury of conspiring to fraudulently manipulate global benchmark interest rates in a stark warning to junior bankers and a major victory for Britain's Serious Fraud Office Calcutta-born Jay Merchant, 45, the most senior of the men on trial, was convicted unanimously while 35-year-old British former Libor submitter Jonathan Mathew and former trader Alex Pabon, a 38-year-old American