J.P. Morgan this week named Nelle Miller and William Sinclair as the new co-CEOs of its U.S. Private Bank, a specialized wealth management division that serves important clients.The Private Bank is one of the largest providers of wealth management services with more than $2.4 trillion in total client assets and 57 offices nationwide, according to its website.Miller also serves on the Asset & Wealth Management Operating Committee and the Global Private Bank Operating Committee and chairs the Advisory Council for the New York City Market Leadership Team.She previously led the largest region...