This Exam FM sample reference tests Bond Valuation. Write the three- and six-year prices at the common 5% half-year yield; their 49 difference isolates the semiannual coupon as 37, choice A.
These notes identify the calculation error associated with each wrong letter when that error is reproducible.
BChoice B is inconsistent with the difference of the two bond-price equations; no distinct standard single-step error producing it is identifiable.
CChoice C is inconsistent with the difference of the two bond-price equations; no distinct standard single-step error producing it is identifiable.
DChoice D is inconsistent with the difference of the two bond-price equations; no distinct standard single-step error producing it is identifiable.
EChoice E is inconsistent with the difference of the two bond-price equations; no distinct standard single-step error producing it is identifiable.
Original practice · fully worked
Original variant: price effect of doubling a bond term
A face-1,000 bond pays semiannual coupons of 27.8038 and yields 8% nominal convertible semiannually. By how much does its price decrease if its term changes from four years to eight years, with coupon and yield unchanged?
A 40.00
B 50.00
C 60.00
D 70.00
E 80.00
Variant answer in brief
Subtracting the sixteen-period price from the eight-period price gives a decrease of 60.00, choice C.
Setup
Setup
Translate four and eight years into eight and sixteen half-year periods.
P8=27.8038a8∣0.04+1000v8
Model
Model
Price each bond using the same semiannual coupon and 4% periodic yield.
P16=27.8038a16∣0.04+1000v16
Compute
Compute
The shorter-term price exceeds the longer-term price by approximately 60.0001.
P8−P16=60.0001
Answer
Answer
Doubling the term decreases price by 60.00, corresponding to choice C.
price decrease=60.00(C)
Calculator reproduction
BA II Plus keystrokes
2nd CLR TVM; 2nd I/Y; 1 ENTER; ↓; 1 ENTER; 2nd CPT; 2nd PMT; if BGN is displayed, 2nd ENTER; 2nd CPT; 8 N; 4 I/Y; 27.8038 PMT; 1000 FV; CPT PVPV = -917.89END mode; I/Y is the half-year effective yield for the four-year term.
2nd CLR TVM; 2nd I/Y; 1 ENTER; ↓; 1 ENTER; 2nd CPT; 2nd PMT; if BGN is displayed, 2nd ENTER; 2nd CPT; 16 N; 4 I/Y; 27.8038 PMT; 1000 FV; CPT PVPV = -857.89; decrease = 60.00END mode; I/Y is the half-year effective yield for the eight-year term; subtract price magnitudes.
The 2210-page Financial Mathematics Proof Manual reorganizes 461 verified Exam FM solutions by syllabus skill and adds formula proofs, error patterns, and original worked practice.