According to reports, Bruno Iksil, the former JPMorgan trader who became known as the “London Whale” has denied responsibility for generating more than $6.2 billion in losses in credit-swap index trades. In a letter to Bloomberg, Mr Iksil states that he was “instructed repeatedly” to execute the strategy that had been initiated, approved, mandated and monitored by the CIO’s senior management. In his letter, Mr Iksil says he repeatedly warned superiors in 2011 and early 2012 about the potential for a large loss as they pressed him to carry out a revised trading strategy, part of an effort to reduce the unit’s risk-weighted assets. Mr Iksil asserts that he was singled out “for no good reason.”