Final losses on JPMorgan derivatives could balloon and up to $9 billion. This was stated by the New York Times, which reports an internal projection of the bank. Already in May JPMorgan's number one James Dimon had announced a loss of 2 billion dollars, due to some transitions made by the London office.
An already very high loss, therefore, also in terms of reputation, which could, as mentioned, continue to grow, up to 9 billion, endangering the entire balance sheet of the American bank, which had closed 2011 with profits of 20 billion.
At the link you will find the original article of the New York Times: http://dealbook.nytimes.com/2012/06/28/jpmorgan-trading-loss-may-reach-9-billion/