THE dollar's steep drop this year has triggered speculation that central banks may soon intervene in the foreign-exchange markets to prop up the sickly currency.

美元今年急速下滑引起人们开始推测，央行可能马上就会对外汇市场进行干预，以支持有些病态的货币。

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High oil prices have allowed state and private investors across the Gulf to funnel billions of dollars into property markets, infrastructure projects and, more recently, foreign-exchange speculation.

高涨的油价使得海湾各国的国有和私人投资者能将上百亿美元资金投入房地产市场、基础设施项目，不久前更是投入了外汇投机交易。

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" He called foreign-exchange speculation "unnecessary, unproductive and immoral.

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Or to put it another way, the vast majority of foreign exchange trading was supporting market speculation, not genuine wealth-creating activity by businesses.

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Instead its foreign-exchange reserves are building up because of strong capital inflows, driven by speculation that it will have to revalue its currency.

ECONOMIST: China's economy