Industry-wide, outstanding loans rose about 13 percent over that period to $719 billion, according to data from consumer credit rating service Experian. JPMorgan Chase is the biggest bank in the United States by assets, but is only the fourth-biggest auto lender by Experian's count. Sheinbaum did not return a call seeking comment on Monday. The shift in leadership shows the needle that JPMorgan Chase must thread as the auto lending market heats up.