Ex-JPMorgan 'Whale' supervisor files claim against UK regulator

March 19 Wed Mar 19, 2014 6:43pm EDT

March 19 (Reuters) - A former JPMorgan Chase & Co executive fighting U.S. extradition from Spain for allegedly helping to hide more than $6.2 billion in trading losses has filed a claim against Britain's financial regulator.

Javier Martin-Artajo, who oversaw an ex-JPMorgan trader nicknamed the "London Whale" for his large bets on derivatives markets, filed the claim against the Financial Conduct Authority (FCA) at a tribunal in London on March 12, according to the court's website. (link.reuters.com/saj77v)

Details about the case were not available and no hearing date has been set.

The "London Whale" scandal has cost America's largest bank $920 million in penalties from U.S. and British regulators so far, including the U.S. Securities and Exchange Commission and the FCA.

Neither the FCA nor Martin-Artajo's lawyer could be reached for immediate comment. (Reporting by Richa Naidu in Bangalore; Editing by Tom Brown)

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