美国经济是世界经济好坏的晴雨计，因为它是世界经济的龙头和火车头。从目前情况看，向好回升的因素不多，向衰退方向发展的可能性较大。若美国房价再发生暴跌、石油涨价、美元贬值，很可能导致美国股市大幅下滑，若道琼斯指数跌至７０００点以下，纳指大幅下跌至１２００点以 The U.S. economy is a barometer of the world economy because it is the leader of the world economy and the locomotive. Judging from the current situation, there are not many factors for a good recovery and the possibility of developing toward a recession is greater. If housing prices plunge further in the United States, a rise in oil prices and a depreciation of the U.S. dollar may well result in a sharp decline in the U.S. stock market. If the Dow Jones index falls below 7000 and the Nasdaq falls sharply to 1200