|
December 31, 2017 |
|
Ultimate parent |
|
Parent |
|
|
|
|
|
|
|
|
|
Risk-free interest rate |
|
1.89 |
% |
1.83 |
% |
|
Distribution yield |
|
0.46 |
% |
1.12 |
% |
|
Expected volatility |
|
18.76 |
% |
16.94 |
% |
|
Expected remaining life |
|
2.7 years |
|
2.4 years |
|
|
December 31, 2016 |
|
Ultimate parent |
|
Parent |
|
|
|
|
|
|
|
|
|
Risk-free interest rate |
|
1.21 |
% |
1.13 |
% |
|
Distribution yield |
|
0.48 |
% |
1.33 |
% |
|
Expected volatility |
|
19.26 |
% |
19.01 |
% |
|
Expected remaining life |
|
3.7 years |
|
3.2 years |
|