Second, exchange rates need to reflect economic fundamentals. But while theory suggests that flexible exchange rates should blunt foreign monetary or financial shocks, in practice, such a currency regime rarely works on its own.
其次，汇率需要反映经济基本面。但尽管有理论认为弹性汇率应该可以弱化货币或金融冲击，但在实践中这种汇率制度却很少能自行运作。