A New York City Police office stands at

A New York City Police office stands at

A New York City Police office stands at the entrance to the JP Morgan Chase World Headquarters on Park Avenue May 15, 2012 in New York. The US Justice Department has opened an investigation into JPMorgan Chase’s more than $2 billion trading loss that the Wall Street bank announced last week, media reports said Tuesday. AFP PHOTO/TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/GettyImages)