JPM Top Exec Mary Erdoes: "There''s A Reason" Junior Bankers Must Work 72 Hour Weeks JPM Top Exec Mary Erdoes: "There''s A Reason" Junior Bankers Must Work 72 Hour Weeks As debate continues to rage about what the "appropriate" amount of work is for junior investment bankers, Mary Erdoes, chief executive officer of JPMorgan Chase Co.s asset and wealth management business is weighing in with an opinion that the snowflakes complaining about their workload might not like. Erdoes says that "there''s a reason" that junior bankers are forced to work 12 hour days, six days a week, according to Bloomberg. She says the hours will "help them master the job in two to three years" instead of the five years it would otherwise take. If you think 10,000 hours is about what you need to master any subject, if someone comes in and has a regular, eight-hour-a-day job, five days a week, its gonna take about five years to have a base-level mastery, she told David Rubenstein on Bloomberg Wealth. She continued: On Wall Street, its more like 12 hours a day, six days a week. That cuts you down to about two and a half years before you become mastered in something. She also told the story of starting in the industry by balancing her grandmother''s checkbook at the age of 6, earning a few of "a few dollars a month". 2,200 new analysts will be starting training with JP Morgan this summer.