FearsaboutdeterioratingeconomicconditionsinChina,BrazilandRussiahaveledtoamassiveretreatfromemergingmarketexchangetradedfunds.對中國、巴西和俄羅斯經濟狀況惡化的擔憂導致新興市場交易所交易基金(ETF)遭遇......