ADMS 1000 Lecture Notes - Lecture 19: Foreign Exchange Spot, Call Option

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ADMS 1000 Full Course Notes
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ADMS 1000 Full Course Notes
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The put option premium (p) has a lower bound of zero or the spread between the exercise price (x) and the underlying spot exchange rate (s), whichever is greater, as shown below: p max 0, x s . Arbitrage would continue until the market forces realigned the spread (x s) to be less than or equal to the put premium. Premium (c) has a lower bound of at least zero or the spread between the underlying spot exchange rate (s) and the exercise price (x), whichever is greater, as shown below: This floor is enforced by arbitrage restrictions. For example, assume that the premium on a british pound call option is $. 01, while the spot rate of the pound is . 62 and the exercise price is . 60. In this example, the spread (s x) exceeds the call premium, which would allow for arbitrage. One could purchase the call option for $. 01 per unit, immediately exercise the option at.

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