But von Braum said recent research highlighted the role of commodity speculators: "What we didn't foresee two years ago is how speculation exacerbated the real market issues."

但冯布劳恩表示，最新研究突显出商品投机者在其中所起的作用。他说：“两年前我们没有预见到的是，投机活动能如此加剧市场的实际问题。”