TOKYO - The dollar slumped further on Friday in Asia on the lingering effects of the Federal Reserve's lower interest rate outlook. The greenback has been hammered on foreign exchange markets since the Federal Reserve on Wednesday lowered its interest rate forecasts for this year, citing weak global growth and the recent turbulence across markets. The dollar broadly retreated against higher-yielding emerging currencies on Friday and continued its slide against the yen, amid speculation among analysts that the Bank of Japan may intervene to halt the safe-haven unit's gains.