# Yen in options, Japanese Yen Futures Options Trading

Here is a list of common errors and challenges side by side with four simple examples for options on the USD JPY pair that we hope would clear the frustration around this pair. Currency convention and intrinsic value In general, the intrinsic value of a call option is max ST-K, 0 while that of a put option is max K- ST, 0 For example when the call option is on USD see example 1i.

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- The country's status as the world's largest creditor, rather than its economic prowess, has given its currency—the Japanese yen—a reputation in the marketplace as a safe haven.
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But what is the appropriate convention for Spot and Strike exchange rates? If the exchange rate is expressed as the number of Japanese Yen per US Dollar the spot and strike exchange rates in intrinsic value and call option formulae should be used as is.

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The option will only be exercised if the value of the US Dollar appreciates against the Japanese Yen or the Japanese Yen depreciates against the US Dollar in relation to the strike exchange rate. Using the rates as is in the call option pricing formula without considering the logic behind the transaction or the appropriateness of the convention will result in an error.

Simple application of max ST-K, 0 would result in a positive payoff which would be incorrect. Logically, a rational buyer would not sell Japanese Yen buy US Dollar at a rate lower higher than the market rate. Convention wise, the exchange rates would need to be inverted first before application to the call option formula.

In like manner for the equivalent put option on JPY see example 2i. Again what is the appropriate Spot and Yen in options rate conventions? If the exchange rate is expressed as the number of Japanese Yen per US Dollar, the rates will need to be inverted before application in the put formulae.

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- Ведь с тех самых пор, как впервые попал в Лиз, он действительно узнал очень многое, но до сих пор у него и минутки свободной не было, чтобы спокойно предаться размышлениям.
- Советнику известно, что я не могу комментировать инструкции, данные мне моими создателями.
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If the exchange rate is expressed as the number of US Dollar per Japanese Yen, the rates can be used as is. For a put option on USD see example 3 : If the exchange rate is expressed as the number of Japanese Yen per US Dollar, the rates will need to be used as is in the put formulae. If the exchange rate is expressed as the number of US Dollar per Japanese Yen, the rates will need to be inverted before application in the formulae.

For an equivalent call option on JPY see example program for binary options mt4 : If the exchange yen in options is expressed as the number of Japanese Yen per US Dollar, the rates will need to be inverted before application in the call formulae. Currency convention and risk free rates After determining the appropriate currency convention to use in the option pricing formula, another point of confusion is with regard to the risk free rates.

This is true for examples 1 and 3 below.

When the currency convention is inverted in the call and put formula, i. Calculating option premiums After calculating the premium a common confusion is wrt the currency in which the premium is trading signal 23 05. Again we look at the currency convention used in the call and put formulae.

Total option contract value Following on point 3 above, another error lies in calculating the total contract value of the option. Will USD notional be converted using the initial spot rate or yen in options strike rate?

One way to decipher this is to think of how you would have to rewrite the product term sheet for the inverted currency convention with notional expressed in JPY terms at the same time maintaining equivalency between the two term sheets? What JPY notional will make the two product term sheets the opposite sides of the same coin?

The original term sheet speaks of an exchange of currency at a pre-defined strike exchange rate.

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In particular, for a call option on USD that is exercised, the customer will buy USD at the exchange rate of This means he will sell JPYExample No. The notional amount is USD We have:.

Option price valuation is not as straightforward as futures valuation.