This Exam FM sample reference tests Bond Pricing and Yields. Per unit face, coupon rate 2.25i makes price equal to 2.25 minus 1.25 times v to the term. The first premium implies v to the eighteenth = 0.5120; the second premium then gives v to the n = 0.64, resulting in n = 12 and choice B.
These notes identify the calculation error associated with each wrong letter when that error is reproducible.
AChoice A (10) does not satisfy both premium price ratios under the common coupon-to-yield multiple; no distinct standard one-step error is identifiable.
CChoice C (14) does not satisfy both premium price ratios under the common coupon-to-yield multiple; no distinct standard one-step error is identifiable.
DChoice D (17) does not satisfy both premium price ratios under the common coupon-to-yield multiple; no distinct standard one-step error is identifiable.
EChoice E (20) does not satisfy both premium price ratios under the common coupon-to-yield multiple; no distinct standard one-step error is identifiable.
Original practice · fully worked
Original variant: shorter-bond premium predicted from one calibrated coupon multiple
At a 4% annual yield, a 15-year bond has coupon rate k times its yield and sells for 1.30 per unit face. Another bond has the same coupon-to-yield multiple and an eight-year term. Calculate its price per unit face.
A 0.95
B 1.00
C 1.06
D 1.12
E 1.18
Variant answer in brief
The 15-year price calibrates coupon multiple k = 1.6746. Applying that multiple to the eight-year discount factor gives price ratio 1.1817, choice E.
Setup
Setup
Use the first bond's price to solve the coupon-to-yield multiple.
1.30=k(1−v15)+v15
Model
Model
Apply the recovered multiple to the eight-year bond.
P8=k(1−v8)+v8
Compute
Compute
The calibrated multiple is 1.67455825, and the second price ratio is 1.18166514.
k=1.6745582528
P8=1.1816651448
Answer
Answer
The eight-year price is 1.1817 per unit face, selecting choice E.
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