Key Takeaways U.S. regulators agreed on a plan to relax a core Basel III capital rule for major banks.The proposal cuts total capital needs by up to 27% for big banks' depository units.Looser requirements may expand lending and Treasury trading flexibility for banks.U.S. financial regulators have reached consensus on the proposed plan to relax a key capital requirement for the country’s largest banks, including JPMorgan Chase (JPM) , Bank of America (BAC) , Goldman Sachs (GS) and Morgan Stanley (MS) . The f ...