套期保值费用的存在，致使套期保值效果较差的粮食期货市场存在恶性循环；
The existence of hedging expenses causes some grain futures markets with low hedging effectiveness to fall into a vicious circle;
她认为，粮食价格的剧增，是期货市场投机活动的结果；而这次饥荒也是严格财政控制的良机。
The steep rise in food prices, she argues, is the result of speculation in the futures markets; the famine is a chance for stricter financial regulation.
粮农组织在今天发布的政策简介中表示，两年前全球粮食价格上涨的态势“在有组织的期货市场中可能受到投机商的进一步推动。”
In a policy brief published today, FAO said the worldwide rise in food prices two years ago "might have been amplified by speculators in organized futures markets."
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