The central banks of South Korea, Brazil, Taiwan, Japan, Switzerland, and many other countries are now buying dollars in order to protect their own currencies against revaluation and thus to defend their exports. Europe also became nervous after the euro exchange rate rose to more than $1.40, far beyond the purchasing power parity (PPP) rate of $1.17.
韩国、巴西、台湾、日本、瑞士以及其他许多国家的央行正在购买美元来防止它们本国货币的升值，以此来保护他们的出口。对于欧元汇率超过1.4美元，欧洲也是紧张不已，这远远超出了1.17美元的购买力平价率。