Assume corn forward prices over the next 3 years are 2.25, 2.35, and 2.28, respectively. Effective annual interest rates over the same period are 5.2%, 5.5%, and 5.8%. What is the 2-year swap price on a hypothetical ”forward swap” that begins at the end of year 1? (a) 2.14 (b) 2.32 (c) 2.41 (d) 2.53
Year (n) | 1 | 2 | 3 |
Forward price (f) | 2.25 | 2.35 | 2.28 |
Interest rate ('r) | 5.20% | 5.50% | 5.80% |
For the given forward prices, the present value of the cost for a 2-year forward swap is
f2/(1+r2)^2 + f3/(1+r3)^3 = 2.35/(1+5.50%)^2 + 2.28/(1+5.80%)^3 = 4.04
A swap will usually call for equal payment every year, so for a 2-year forward swap which begins at the end of year 2, the annual cost for this swap will be
c/(1+r2)^2 + c/(1+r3)^3 = 4.04
Solving for c,
c/(1+5.50%)^2 + c/(1+5.80%)^3 = 4.04
c/1.11 + c/1.18 = 4.04
(1.11+1.18)c = 4.04*1.18*1.11
c = (4.04*1.18*1.11)/(1.11+1.18) = 5.32/2.30 = 2.32 (option b)
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