U.S. Federal Reserve Says Totality Of Capital Changes Under Consideration Would Reduce Largest Bank Capital By 4.8%; Fed To Propose Revised 'GSIB Surcharge' That Lowers Biggest Bank Capital By 3.8%; U.S. Bank Regulators Unveil Proposed New Rules Easing Large Bank Capital Requirements; Regulators To Propose New Standardized Approach For Smaller Banks, Banks Between $250B And $100B In Assets Would See Capital Fall By 5.2%; Fed Says Revised 'Basel III' Proposal Would Increase Large Bank Capital By 1.4%