Investing.com -- The U.S. Treasury intervened in currency markets on Friday by purchasing yen, joining Japan's efforts to support the currency from near four-decade lows, the Financial Times reported. The Federal Reserve Bank of New York sold euros and purchased yen on behalf of the Treasury, according to the report, which cited people familiar with the transaction. Reports of possible U.S. intervention helped strengthen the Japanese currency against the dollar during Friday's session. The U.S. Treasury, New York Fed and Morgan Stanley were not immediately available for comment outside regular business hours. Related articlesUS Treasury intervenes to support yen through purchases - FTGlobal yields retreat as crude slide eases inflation fears ahead of Fed, BOE callsGlobal yields edge lower on safe-haven flows; oil spike caps gains