Answer:
Arithmetic time-weighted rates of return: 4.47%
Geometric time weighted rates of returns: 3.66%
Explanation:
Year-by-year time-weighted average rate of returns are:
2016-2017: ( Beginning price of 2017 + Dividend at year end 2016 - Beginning price of 2016)/Beginning price of 2016 = (120+4-110)/110 = 12.73%
2017-2018: ( Beginning price of 2018 + Dividend at year end 2017 - Beginning price of 2017)/Beginning price of 2017 = (100+4-120)/120 = -13.33%
2018-2019: ( Beginning price of 2019 + Dividend at year end 2018 - Beginning price of 2018)/Beginning price of 2018 = (110+4-100)/100 = 14.00%
=> Arithmetic time-weighted rates of return = (12.73% - 13.33% + 14.00%) / 3 = 4.47%
=> Geometric time weighted rates of returns = [ ( 1+ 0.1273) x ( 1 - 0.1333) x ( 1 + 0.1400) ] ^ (1/3) - 1 = 3.66%