James Bainbridge Lee, Jr. (October 30, 1952 – June 17, 2015) was an American investment banker, notable for his role in the development of the leveraged finance markets in the U.S. in the 1980s. He is widely credited as the architect of the modern-day syndicated loan market. At the time of his death, Lee was vice chairman of JPMorgan Chase & Co. and a member of the bank's executive committee. He was also Co-Chairman of JPMorgan's investment bank.