The recent gains reflect reduced concern about global economic prospects, helped along by the Federal Reserve, which announced a second dose of quantitative easing in November last year.

近期价格的增长表明对全球经济前景的担忧有所减弱，同时有美联储助一臂之力，后者在去年11月采取第二轮的定量宽松政策。

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There is also concern about currency values if central Banks would turn again to the policy of quantitative easing, in effect, printing more money.

现在还有人担忧，如果中央银行印刷更多货币，货币会不会贬值。

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In terms of acquiring another company for the sake of clearing up existing issues, a distribution breakthrough in any BRIC country would do a world of good for Apple by boosting share prices and easing an area of investor concern.

FORBES: To Buy Or Not to Buy: Strategies That Make Sense For Apple

Currency traders are rapidly shifting assets to countries seen as less likely to try to weaken their currencies, amid concern that the fresh round of US monetary easing could trigger another clash in the "currency wars".

CNN: QE3 triggers fear of new currency wars