This is because the inflationary impact form commodity speculation.

这是因为通胀影响催生了商品投机。

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ONIONS are an important ingredient in the history of commodity speculation.

在商品投机的历史上，洋葱是一个重要的组成部分。

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Financial market can make inflation self-fulfilling through commodity speculation.

金融市场可使通胀通过大宗商品投机而自我实现。

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This curious beast combines commodity speculation with a wild bet on the Internal Revenue Code.

FORBES: Magazine Article

Others quickly followed suit, and, according to Kaufman, the Great Commodity Speculation had begun.

FORBES: Commodity Bubble Redux In Full Effect

Others are more debatable: flawed trade policies, increased biofuel production and commodity speculation.

NPR: Summit on Food Crisis Scrutinizes Causes, Solutions