The most accurate dollar forecasters predict the world’s reserve currency will continue sliding even when the Federal Reserve begins to raise interest rates, which policy makers say is an “extended period” away.

Standard Chartered Plc, Aletti Gestielle SGR, HSBC Holdings Plc and Scotia Capital Inc. say the dollar will depreciate as much as 6.4 percent versus the euro. About $12 trillion of fiscal and monetary stimulus, the world’s lowest borrowing costs and a record $4 trillion of government bond sales between 2009 and 2010 will weigh on the currency,