T = 0: Purchase of four shares = -$200.00
T = 1: Dividend from four shares = +$0.00
Sale of two shares = +$100.00
T = 2: Dividend from two shares = +$10.00
Proceeds from selling shares = +$160.00
The money-weighted return is the rate that solves the equation:
$200.00 = $100.00 / (1 + r) + $170.00 / (1 + r)2.
Cfo = -200, CF1 = 100, Cf2 = 170, CPT → IRR = 20.52%.
The holding period return in year one is ($50.00 ? $50.00 + $0.00) / $50.00 = 0.00%.
The holding period return in year two is ($80.00 ? $50.00 + $5.00) / $50 = 70.00%.
The time-weighted return is [(1 + 0.00)(1 + 0.70)]1/2 ? 1 = 30.38%.
The difference between the two is 30.38% ? 20.52% = 9.86%.