北京时间2011年8月6日上午,国际三大评级机构之一的标准普尔宣布下调美国主权信用评级,由AAA降至AA+,欧洲、亚太股市一片惨淡。美债降级的消息传到中国,受其拖累,A股开盘极其惨烈,哀鸿遍地。沪指盘中一度跌至2497.92点,创今年新低。美国信用评级下降对 Beijing time On the morning of August 6, 2011, Standard & Poor’s, one of the three major international rating agencies, announced that it will downgrade US sovereign credit rating from AAA to AA +. As a result, Europe and Asia-Pacific stock markets are in a gloomy mood. The news of the U.S. debt downgrading reached China, dragged down by it, A shares opened extremely tragic, devastated. The stock index fell to 2497.92 points once, the lowest this year. U.S. credit rating is down