UPDATE 1-Spain rejects U.S. extradition of "London Whale" supervisor
April 23, 2015 at 10:26 AM EDT
MADRID, April 23 (Reuters) - Spain on Thursday rejected a U.S. extradition request for Javier Martin-Artajo, an ex-JP Morgan Chase & Co executive indicted over the "London Whale" scandal which led to over $6 billion in trading losses in 2012.