
Explanation:
We are given zero-coupon bonds (coupon = 0%) with the following prices and YTMs (which are the spot rates):
We are also given three implied forward rates:
The question is: Which statement is true based on consistency with the bond prices?
Forward rates must be derived directly from the spot rates (or zero-coupon bond prices) to prevent arbitrage.
The key formulas are:
For 1-year forward rates:
For the 2-year forward rate starting in 1 year:
If a given forward rate does not satisfy the equation above, it is inconsistent with the bond prices → arbitrage opportunity exists.
(1 + 0.07)² = (1 + 0.045) × (1 + f₁,₂)
1.1449 = 1.045 × (1 + f₁,₂)
1 + f₁,₂ = 1.1449 / 1.045 ≈ 1.0956
f₁,₂ ≈ 9.56%
→ The given forward rate of 9.56% matches exactly. It is correct.
(1 + 0.09)³ = (1 + 0.07)² × (1 + f₂,₃)
1.295029 = 1.1449 × (1 + f₂,₃)
1 + f₂,₃ = 1.295029 / 1.1449 ≈ 1.1311
f₂,₃ ≈ 13.11%
→ The given rate is only 10.77%, which is too low.
(1 + 0.09)³ = (1 + 0.045) × (1 + f₁,₃)²
1.295029 = 1.045 × (1 + f₁,₃)²
(1 + f₁,₃)² = 1.295029 / 1.045 ≈ 1.2393
1 + f₁,₃ ≈ √1.2393 ≈ 1.1133
f₁,₃ ≈ 11.33%
→ The given rate of 11.32% is essentially correct (minor rounding difference).
A: The 1-year forward rate one year from today is too low.
→ False. It matches exactly at 9.56%.
B: The 2-year forward rate one year from today is too high.
→ False. It is correct (≈11.33%).
C: The 1-year forward rate two years from today is too low.
→ True. The correct rate should be ~13.11%, but it is given as only 10.77%.
D: The forward rates and bond prices provide no opportunities for arbitrage.
→ False. Because the 1y-forward-2y rate is mispriced, arbitrage exists (you can create a synthetic position using the zeros that profits from this inconsistency).
The given 1-year forward rate two years from today (10.77%) is too low compared to what the bond prices imply (~13.11%). This inconsistency creates an arbitrage opportunity.
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Given the following bonds and forward rates:
| Maturity | YTM | Coupon | Price |
|---|---|---|---|
| 1 year | 4.5% | 0% | 95.694 |
| 2 years | 7% | 0% | 87.344 |
| 3 years | 9% | 0% | 77.218 |
Which of the following statements about the forward rates, based on the bond prices, is true?
A
The 1-year forward rate one year from today is too low.
B
The 2-year forward rate one year from today is too high.
C
The 1-year forward rate two years from today is too low.
D
The forward rates and bond prices provide no opportunities for arbitrage.