Suppose that the current spot rate is S0 = usd/gbp 2 and the one-period interest rates today

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Suppose that the current spot rate is S0 = usd/gbp 2 and the one-period interest rates today are r is 5 percent and r∗ is 10 percent. Also, you are given that in the next period the spot rate will either be usd/gbp 2.2 or usd/gbp 1.8.
(a) What is the value today of a one-period put option on the gbp that has a strike price of usd/gbp 1.9?
(b) Suppose that you already hold this put option. If you wish to hedge the payoff from the put, so that the net payoff of your portfolio is independent of the exchange rate, how many additional units of the spot should you buy/sell?
Strike Price
In finance, the strike price of an option is the fixed price at which the owner of the option can buy, or sell, the underlying security or commodity.
Portfolio
A portfolio is a grouping of financial assets such as stocks, bonds, commodities, currencies and cash equivalents, as well as their fund counterparts, including mutual, exchange-traded and closed funds. A portfolio can also consist of non-publicly...
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