A zero-coupon bond promises to pay $1000 in three years. However, there is a 20% probability that the bond issuer defaults and investors are only able to get $700. There is a further 10% probability that the bond issuer defaults and investors get nothing ($0). To clarify, there is a 70% probability that the bond pays off the full $1000 and a 30% total probability that the bond defaults and the investors get less than $1000. Assume that investors are risk neutral and that time-equivalent treasuries offer an interest rate of 8% per year. The bond is zero-coupon, so makes no intermediate payments. Part 1 What is the expected payoff (in dollars) of the bond in three years? Part 2 What is the current traded price of the bond today? (Remember that the bond pays off or defaults in three years.)

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter12: Probability
Section12.3: Conditional Probability; Independent Events; Bayes' Theorem
Problem 39E: The following problem submitted by Daniel Hahn of Blairstown, Iowa, appeared in the Ask Marilyn...
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A zero-coupon bond promises to pay $1000 in three years. However, there is a 20% probability that the bond issuer defaults and investors are only able to get $700. There is a further 10% probability that the bond issuer defaults and investors get nothing ($0). To clarify, there is a 70% probability that the bond pays off the full $1000 and a 30% total probability that the bond defaults and the investors get less than $1000. Assume that investors are risk neutral and that time-equivalent treasuries offer an interest rate of 8% per year. The bond is zero-coupon, so makes no intermediate payments.

Part 1 What is the expected payoff (in dollars) of the bond in three years?

Part 2 What is the current traded price of the bond today? (Remember that the bond pays off or defaults in three years.) 

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