Original practice · fully worked
Original variant: shorter-term price discount from two known bond schedules
A bond pays 30 every half-year, redeems 1,000, and yields 4% nominal annually convertible semiannually. Compare otherwise identical six-year and three-year versions. By what percentage is the three-year price lower than the six-year price?
- A
4.05% - B
4.27% - C
4.50% - D
4.72% - E
4.95%
Answer and calculation
The six-year and three-year prices are 1105.75 and 1056.01. Their relative difference is 4.50% of the six-year price, choice C.
Setup
Setup
Use the 2% half-year yield to price the twelve-period and six-period cash-flow streams.
P12=30a12∣0.02+1000v12 P6=30a6∣0.02+1000v6 Model
Model
Measure the price reduction relative to the longer bond's price.
q=1−P12P6 Compute
Compute
The prices are 1105.75 and 1056.01, giving reduction 4.4982%.
q=0.04498209 Answer
Answer
The three-year price is 4.50% lower, which is choice C.
q≈4.50%(C) Calculator reproduction
BA II Plus keystrokes
- 2ND · CLR TVM · 12 · N · 2 · I/Y · 30 · PMT · 1000 · FV · CPT · PVPV = -1105.75
- 6 · N · CPT · PVPV = -1056.01Keep I/Y, PMT, and FV unchanged.