Their fears started with the “flash crash” of May 2010, when, in a matter of 30 minutes, major US stock indices fell by almost 10%, before recovering rapidly. Then came the “taper tantrum” in the spring of 2013, when US long-term interest rates shot up by 100 basis points after then-Fed Chairman Ben Bernanke hinted at an end to the Fed’s monthly purchases of long-term securities.
但投资者仍有理由保持担心。他们的恐慌始于2010年5月的“闪崩”，当时，在30分钟内，美国各大股指暴跌近10%，然后又快速收复失地。接着是2013年春的“锥形暴涨”，美国长期利率在时任美联储主席伯南克（Ben Bernanke）暗示将结束月度长期证券购买操作后应声走高100个基点。