这部分的取决于你的分析前提认为金融市场是有效的，还是生来就有行为非理性与投机过度的倾向。
That depends, in part, on whether you begin from the premise that financial markets are efficient, or that they are inherently prone to irrational behaviour and speculative excess.
一些人(不是全部)将近期食品和金属价格的飙涨归咎于商品的过度投机行为。
Immoderate speculation in commodities is blamed by some people (not all) for the recent sharp spikes in food and metal prices.
正如预计，帕潘德里欧将市场波动归咎于投机行为，但他也承认，希过度消费使自身变得脆弱。
Predictably, Mr Papandreou blames speculators for the flare-up in the markets. But he also concedes that his country has been left vulnerable by its own profligacy.
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