Rio Tinto Group and Xstrata Plc rallied with metal prices as the dollar tumbled even after the G-20 pledged to avoid "competitive devaluation" of their currencies.

G20财长会议承诺避免出现竞争性货币贬值，随着金属价格上涨，美元汇率下跌，力拓集团和斯特拉达公司股价上涨。

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The depreciation of the dollar raises concerns among world leaders who agreed at the last meeting to refrain from "competitive devaluation" of currencies.

美元贬值引起各国领导人的忧虑，这些领导人在上次会议上同意不再“竞相贬值”货币。

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Their declaration Friday also promised to avoid competitive devaluation of currencies.

VOA: special.2010.11.13

As most East Asian currencies come down in value, there is obviously some pressure of competitive devaluation.

CNN: Booking a Passage to India