random index pair 随机指标对
index worm gear pair [机] 分度蜗轮副
index-value pair 下标值对偶
index pair
指数对
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Once you know the average return, the standard deviation of each index and the correlation coefficient between each pair of indexes, the rest is math.
FORBES: Asset Allocation and the Efficient Frontier
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