This Exam FM sample reference tests Immunization and Asset-Liability Management. The time-4 asset of 250,000 directly matches that portion of the liability, leaving 500,000. Matching value and first derivative with the year-2 and year-5 assets gives three times AX times v to the −2 equal to 500,000, so AX = 150416.67, choice A.
These notes identify the calculation error associated with each wrong letter when that error is reproducible.
BChoice B (175,000) does not satisfy the time-4 value and first-sensitivity equations after netting the coincident asset; no distinct standard one-step error is identifiable.
CChoice C (200,000) does not satisfy the time-4 value and first-sensitivity equations after netting the coincident asset; no distinct standard one-step error is identifiable.
DChoice D (225,000) does not satisfy the time-4 value and first-sensitivity equations after netting the coincident asset; no distinct standard one-step error is identifiable.
EChoice E (250,000) does not satisfy the time-4 value and first-sensitivity equations after netting the coincident asset; no distinct standard one-step error is identifiable.
Original practice · fully worked
Original variant: central matching asset required after outer duration balance
A liability of 600,000 is due at year 4. Assets pay 100,000 at year 2, 226056.13 at year 5, and Y at year 4. The annual discount factor is 0.96, and the two outer assets are already chosen so their duration effects around year 4 cancel. Calculate Y for full value matching.
A 247,031.25
B 260,755.21
C 274,479.17
D 288,203.13
E 301,927.08
Variant answer in brief
At year 4, the early asset accumulates two periods and the late asset discounts one period. Subtracting those outer values from 600,000 leaves central payment 274,479.17, choice C.
Setup
Setup
Use year 4 as the comparison date and move each outer cash flow to that date with v = 0.96.
600000=100000v−2+Y+A5v
Model
Model
The supplied outer face amounts satisfy the zero first-moment condition around year 4.
−2(100000)v−2+A5v=0
Compute
Compute
Subtracting the outer time-4 values gives Y = 274479.17.
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