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Mock2 第22题 关于 文中riskier asset allocation tend to be underdiversified 这些不是很懂 为什么resampling会overdiversify riskier asset呢？
老师，2018年上午真题 1A中答案中提到的The passive approach provides low tracking risk relative to an active approach. 1B答案中提到的Tacking error is likely to remain low since the number of constitutes in this index is not large 1D答案中提到的A concentrated portfolo tend to have high active risk. 又解释active risk是difference between the weight of portfolio and of benchmark，increases when a portfolio more uncorrelated with its benchmark. 想问，1. tacking error （risk）是不是就是active risk？ 2. 如果是，为什么constituents number 会有这两种不同的结论？ 能不能详细解释一下怎么来理解？
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