NO.PZ2022122601000036
问题如下:
Lastly, Perumal focuses on forecasting the expected returns of investing in direct real estate. He analyzes the previous ten years of multifamily residential real estate returns data. He is skeptical that the volatility of the observed returns reflects smoothing. Perumal uses a publicly traded REIT index to unsmooth the return stream and appropriately reflect the risk (as measured by standard deviation) of investing in multifamily residential real estate (the variance of the REIT index for the measurement period is 16; λ equals 0.8).
Perumal’s unsmoothed standard deviation for multifamily properties for the investment period is closest to:
选项:
A.12 B.18 C.24解释:
Correct Answer: A
Var(r)={(1+λ)/(1-λ)}*var(R)
Var(r)={(1+0.80/(1-0.8)}*16=144
Standard deviation=12
中文解析:
Var (r) ={(1 +λ)/(1 -λ)}* Var(右)
Var (r) = {(1 + 0.80 / (1 - 0.8)} * 16 = 144
标准差= 12
这是啥知识点啊?