为什么非参法优点有收益率等参数

问题如下：

Which of the following is excluded from the advantages of the non-parametric method for estimating VaR values?

选项：

A.Handle non-normal returns( skew ).

B.Uses readily available data (returns, volatility).

C.Easily handling in-sample shifts.

D.In theory, handle any position type including derivatives

解释：

Easily handling in-sample shifts is not an advantage of non-parametric methods. In-sample shifts refer to changes in the underlying distribution of the data within the sample period. Non-parametric methods, especially historical simulation, may not easily adapt to such shifts since they rely on the historical data as it is, without making any adjustments for changing conditions.