Question 2.35: Find the return on a 75-day investment in zero-coupon bonds ...

Find the return on a 75-day investment in zero-coupon bonds if B(0, 1) = 0.89.

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By solving the equation

(1 + r)^{−1} = 0.89

we find that r ≅ 0.1236, that is, the effective rate implied by the bond is about 12.36%. The price of the bond after 75 days will be

B(75/365, 1) = B(0, 1) (1 + r)^{\frac{75}{365} }=0.89 (1 + 0.1236)^{\frac{75}{365} }\cong 0.9115

and the return will be

K(0, 75/365) =\frac{B(75/365,1)-B(0,1)}{B(0,1)}\cong \frac{0.9115-0.89}{0.89} \cong 0.0242,

about 2.42%.

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