Since 1976, most major economies have used a system of floating exchange rates to value the currency; this means the value of one currency is always changing in relation to others.

• 一个国家货币价值的稳定性取决于外汇市场和经济状况。随着时间的流逝，货币的兑换价成为衡量货币稳定性最直接的方法。货币交易发生在世界各地的外汇市场。