For three years, repeated warnings that such an attack is imminent have flown in the face of the evidence: US Treasury securities remain a safe-haven asset for global investors, including risk-sensitive foreign central banks. Indeed, global investors ignored Standard &amp;
三年来，对这种迫在眉睫危机的再三警告在以下证据面前站不住脚：美国国债市场仍为全球投资者的避险资产，这包括对风险极为敏感的国外央行。事实上，全球投资者忽略了标准普尔2011年下调美国政府债务评级、导致其收益率进一步下跌的决定。