1979年10月，美国中央银行(联邦储备系统)宣布，在限制美元利率波动方面，它将扮演一个较为超然的角色。这个新政策实施后。美元相对于外国货币的汇率变得更加多变。从我们对外汇市场的分析中可以找到这两个事件之间的联系吗? In October 1979，the U.S. central bank(the Federal Reserve System)announced it would play a less active role in limiting fluctuations in dollar interest rates．After this new policy was put into effect，the dollar's exchange rates against foreign currencies became more volatile．Does our analysis of the foreign exchange market suggest any connection between these two events?