宇同學
2022-12-29 22:3938. The average return for Portfolio A over the past twelve months is 3%, with a standard deviation of 4%. The average return for Portfolio B over this same period is also 3%, but with a standard deviation of 6%. The geometric mean return of Portfolio A is 2.85%. The geometric mean return of Portfolio B is:A. less than 2.85%.B. equal to 2.85%.C. greater than 2.85%
所屬:CFA Level I > Quantitative Methods 視頻位置 相關試題
來源: 視頻位置 相關試題
1個回答
Evian, CFA助教
2022-12-30 10:00
該回答已被題主采納
ヾ(?°?°?)??你好同學,
可以從兩個角度判斷:
1.定性:當隨機變量的波動越大時,A和G相差越遠。當算數(shù)平均數(shù)相同的情況下,由于B組合比A的標準差更大,于是B的幾何平均數(shù)更小。
2.定量:用G≈A-1/2σ2判斷,當隨機變量的波動越大(σ↑)時,A和G相差越遠。
字母表示信息:
A:arithmetic mean
G:geometric mean
登錄金程網(wǎng)校查看視頻解析:
http://www.h8045.cn/home/#/exam/single/q101876/
----------------------
學而時習之,不亦說乎??【點贊】鼓勵自己更加優(yōu)秀,您的聲音是我們前進的源動力,祝您生活與學習愉快!~
