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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BHP and Rio are the world's second and third-biggest producers of the metal that is steel's key ingredient.

必和必拓和力拓分别是全球第二、第三大铁矿石生产商，铁矿石是钢铁的关键成分。

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Singer Derrick Green of Brazilian heavy metal band Sepultura performs at the Rock in Rio Music Festival in Rio DE Janeiro September 25, 2011.

巴西重金属乐队Sepultura的歌手井架绿色在摇滚音乐节在里约热内卢里约热内卢9月25日，2011年执行。

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Left in ruins, the old brick exterior has metal walkways that ascend to a cupola with fine views over Guanabara Bay and downtown Rio.

BBC: Bohemian Santa Teresa

Analysts say that Rio's refusal to team up with BHP is indicative of its conviction that mineral and metal prices will stay high for years to come, fuelled by strong demand from emerging economies such as China and India.

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