For example, some inflation-targeting central banks have reacted to increases in prices of imported commodities by tightening monetary policy and thereby increasing the value of the currency. But adverse movements in the terms of trade must be accommodated; they cannot be fought with monetary policy.
G20的措施将在11月的戛纳峰会上达到高潮。但是，在制定具体政策的时候必须慎之又慎，历史上，意在降低商品价格波动性的措施最后反而助长波动的例子数不胜数。