The sources also noted the investigation includes a closer look at new client activities at Highbridge Capital Management, a hedge fund firm owned by JPMorgan. The CFTC is investigating why such a high percentage of Highbridge’s AUM stems from JPMorgan’s private-bank assets, and, moreover, just how important was the new client cash infusion in stabilizing Highbridge during the financial crisis, according to the WSJ sources. One key issue that investigators are looking at is the fact that by the end of 2012, JPMorgan private-bank client assets had grown to account for 71% of Highbridge’s flagship fund, an increase from a...