Two leading investment banks are taking steps to prevent junior bankers from working more than 100 hours a week following complaints of overwork. JPMorgan is instituting an 80-hour weekly cap for junior bankers in a first-of-its-kind move for the bank, while Bank of America, which already flags work beyond a 100-hour weekly limit, is unveiling a new timekeeping tool to more closely track bankers’ time in the office, per the Wall Street Journal and Bloomberg. As part of an investigation published last month, the Journal found junior bankers at Bank of America were instructed to conceal when the…