FE 610 Stochastic Calculus for Finance Final Section A
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FE 610 Stochastic Calculus for Finance Final Section A
May 8, 2018
1. Assume that the stock S(t) follows Geometric Brownian Motion and that there is a constant risk-free interest rate r . We will create a new type of forward, known as the ”Cross Forward” . This derivative secu- rity will have as payout at maturity the formula:
V (T) = S(T) - KS(T) + K
for some constant K . For what value of K do we have V (0) = 0?
2. (a) Prove or Disprove: The product of two martingales is a martin- gale.
(b) Prove or Disprove: All Markov Processes are Martingales.
3. We have an interest rate R(t) = r + σ (t) for some positive constants r and σ . Determine the formula, at any time t < T for a zero-coupon bond that pays one dollar at time T. You may assume that:
B(t, T) = e −R~t(C~t,T( −A~t,T(
4. Simplify:
t
W (t)(W (u) - uW2 (u))dW (u)
)
2023-05-07