This Exam FM sample reference tests Immunization and Asset-Liability Management. At 7%, the liability present value is 777020.93 and the five-year zero is worth 172670.99, leaving long-zero present value 604349.94 and face 1558336.95. Repricing both assets and the liability at 4% gives surplus 5910.23, choice A.
These notes identify the calculation error associated with each wrong letter when that error is reproducible.
BChoice B (8,871) does not satisfy the initial value match at 7% and complete repricing of both zeros and the liability at 4%; no distinct standard one-step error is identifiable.
CChoice C (11,029) does not satisfy the initial value match at 7% and complete repricing of both zeros and the liability at 4%; no distinct standard one-step error is identifiable.
DChoice D (14,746) does not satisfy the initial value match at 7% and complete repricing of both zeros and the liability at 4%; no distinct standard one-step error is identifiable.
EChoice E (17,462) does not satisfy the initial value match at 7% and complete repricing of both zeros and the liability at 4%; no distinct standard one-step error is identifiable.
Original practice · fully worked
Original variant: surplus after a yield shift for a symmetric zero-coupon immunization
A 100,000 liability due at year 6 is immunized at 5% using three-year and nine-year zero-coupon bonds with equal present-value weights. Immediately afterward the flat annual yield becomes 3%. Calculate asset present value minus liability present value.
A 125.48
B 132.45
C 139.42
D 146.39
E 153.36
Variant answer in brief
The initial equal weights determine zero faces 43,191.88 and 57,881.25. Repricing both at 3% and subtracting the year-6 liability value gives surplus 139.42, choice C.
Setup
Setup
At 5%, split the liability present value equally because years 3 and 9 are symmetric around duration 6.
P3=P9=21100000(1.05)−6
Model
Model
Accumulate each present-value weight to its own maturity face amount.
F3=P3(1.05)3
F9=P9(1.05)9
Compute
Compute
Repricing at 3% gives surplus 139.421487.
S=F3(1.03)−3+F9(1.03)−9−100000(1.03)−6
S=139.42148719
Answer
Answer
The yield shift creates surplus 139.42, selecting choice C.
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