棉花 COTTON,向均值回归?

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内外盘皆是,价格几十年在区间内波动,具有极强周期性,不像其他大宗或农产品,跟着人均GDP,宏观经济上升下降,图表来看反而像,统计学上的向均值回归,也就是价格具有物理特性?有点意思。
2010后这十多年均价比之前几十年抬高了个30%左右。
等了两年了,先加个跟踪。

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