The amount of deviation is also affected by the number of different asset classes in the portfolio. 这句话如何理解？视频上讲的好像与此无关。
Shimin_CPA税法主讲、CFA教研 · 2019年01月27日
The amount of change appropriate to modify an allocation will in large part depend on the number of asset classes used in the allocation. A 5 percent change in 10 asset classes, for example, could yield a substantial tilt to or away from risky assets; however, for an asset allocation with 4 asset classes, 5 percent would not be enough.
引用原版书上的一段解释：如果组合中有10个资产类型，每个资产改变5%会导致大幅偏离风险资产；但是如果组合中共有4个资产类型，每个资产改变5%造成的影响并不大。这是因为资产类型多，每个资产的占比就会下降，同样改变5%，对占比小的资产影响大。