This Exam FM sample reference tests Cost of an Exactly Matched Bond Portfolio. Matching the one-year liability requires 1500/1030 units of the coupon bond, costing 1481.72 and producing 43.69 at six months. A six-month zero supplies the remaining early liability for 1922.66, so total cost is 3404.39 and choice B.
These notes identify the calculation error associated with each wrong letter when that error is reproducible.
AChoice A prices the coupon bond at its 6% coupon rate instead of its 4.2% nominal yield.
CChoice C neglects the coupon bond's six-month coupon when sizing the zero-coupon position.
DChoice D buys 1500 of coupon-bond face instead of scaling face to a 1500 maturity cash flow.
EChoice E adds the two liability amounts and discounts both for only six months.
Original practice · fully worked
Original variant: dedicate a two-date liability
A liability pays 1,000 after six months and 2,000 after one year. Available assets are six-month zeroes yielding 3% nominal convertible semiannually and one-year par bonds with 4% nominal coupons and 5% nominal yield, both convertible semiannually. Find the cost of an exactly matched portfolio.
A 2,801.33
B 2,844.19
C 2,888.47
D 2,927.60
E 2,965.18
Variant answer in brief
The one-year bonds cost 1941.89 and contribute 39.22 at six months. Discounting the remaining early liability costs 946.59, for total cost 2888.47 and choice C.
Setup
Setup
Price a 1000-face one-year bond using 2.5% per half-year.
PB=1.02520+1.02521,020=990.3629
Model
Model
Scale its final payment to the 2000 year-1 liability.
u=1,0202,000
uPB=1,941.8880
20u=39.2157
Compute
Compute
Supply the six-month residual with zeroes discounted at 1.5%.
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