3. Consider two investments which have each produced returns over a period of seven years. Investment A produced a return of 20% in year one, zero in year two, 20% in year three, zero in year four, 20% in year five, zero in year six, and 12% in year seven. Investment B produced a return of 10% in each year. 3 a. Compute the arithmetic and geometric mean returns for each investment. 3 b. Beginning with $1000, work out what the value of each of the investments would have been after seven years, and determine which was the better invest- ment. 3 c. The two mean-return calculations, arithmetic and geometric, rank the in- vestments differently. Which one of the two correctly reproduces the ranking by total final value? Why does the other mean calculation get it 'wrong'?

Essentials Of Investments
11th Edition
ISBN:9781260013924
Author:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Publisher:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Chapter1: Investments: Background And Issues
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3. Consider two investments which have each produced returns over a period of
seven years. Investment A produced a return of 20% in year one, zero in year two,
20% in year three, zero in year four, 20% in year five, zero in year six, and 12% in
year seven. Investment B produced a return of 10% in each year.
3 a. Compute the arithmetic and geometric mean returns for each investment.
3 b. Beginning with $1000, work out what the value of each of the investments
would have been after seven years, and determine which was the better invest-
ment.
3 c. The two mean-return calculations, arithmetic and geometric, rank the in-
vestments differently. Which one of the two correctly reproduces the ranking
by total final value? Why does the other mean calculation get it 'wrong'?
Transcribed Image Text:3. Consider two investments which have each produced returns over a period of seven years. Investment A produced a return of 20% in year one, zero in year two, 20% in year three, zero in year four, 20% in year five, zero in year six, and 12% in year seven. Investment B produced a return of 10% in each year. 3 a. Compute the arithmetic and geometric mean returns for each investment. 3 b. Beginning with $1000, work out what the value of each of the investments would have been after seven years, and determine which was the better invest- ment. 3 c. The two mean-return calculations, arithmetic and geometric, rank the in- vestments differently. Which one of the two correctly reproduces the ranking by total final value? Why does the other mean calculation get it 'wrong'?
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