NO.PZ201812020100001201
问题如下：
Recommend
the portfolio in Exhibit 1 that would best achieve the immunization.
Justify your response
选项：
解释：
Answer
Justification:
Portfolio
A is the most appropriate portfolio because it is the only one that satisfies
the three criteria for immunizing a single future outflow (liability), given
that the cash flow yields are sufficiently close in value:
1.
Market Value: Portfolio A’s initial market
value of $235,727 exceeds the outflow’s present value of $234,535. Portfolio B
is not appropriate because its market value of $233,428 is less than the
present value of the future outflow of $234,535. A bond portfolio structured to
immunize a single liability must have an initial market value that equals or exceeds
the present value of the liability.
2.
Macaulay Duration: Portfolio A’s Macaulay
duration of 9.998 closely matches the 10-year horizon of the outflow. Portfolio
C is not appropriate because its Macaulay duration of 9.503 is furthest away
from the investment horizon of 10 years.
3.
Convexity: Although Portfolio C has the
lowest convexity at 108.091, its Macaulay duration does not closely match the
outflow amount. Of the remaining two portfolios, Portfolio A has the lower
convexity at 119.055; this lower convexity will minimize structural risk.
Default risk (credit risk) is not considered because the portfolios consist of
government bonds that presumably have default probabilities approaching zero.
Default
risk (credit risk) is not considered because the portfolios consist of
government bonds that presumably have default probabilities approaching zero.
duration的差距多大是大？
我选的是C，因为（1）both portfolio A (9.998) and C's (9.503) duation（四舍五入） is very close to 10；（2）但c's convexity(108.091)最小
