Foreign Exchange Impact

Experts,

Has anyone had experience developing a foreign exchange impact in a db?  

Eg:
- the issued amount is 10 Euros at X USD/Euro exchange rate.  
- At the end of the month your value is say 10.5
- therefore the difference of .5 is the Foreign Exchange Impact as the issued value of 10 did not change.  
- Another scenario could be if you decreased the amount from 10 to say 8 then the Foreign Exchange impact would not be 2 as this is the amount you decreased it by and is not related to changes in the foreign exchange rate.

I don't expect many responses here.  I searched EE and did not find anything.  Maybe someone has had some experience with this.

Thank you
pdvsaProject financeAsked:
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als315Commented:
This is standard for accounting DBs with many possible currencies. You should give more details of your task. For example, it can be bank deposit in Euro: you put 10 USD, convert to Euro and then get back also in USD, but with new exchange rate.
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Jeffrey CoachmanMIS LiasonCommented:
Yes, this is tricky because all major currencies "Float" against one another.
This is updated every 10 minutes in some cases, so you will have to consider the "Timing" here as well.
In some cases, this change in the rate could amount to a gain or loss of Millions of dollars, if the "Exchange Rate Refresh Interval", is not clearly stated and implemented.

For example, there was a sharp change in the Yen/Dollar exchange Rate, immediately after the Earthquake/Tsumami in Japan.
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pdvsaProject financeAuthor Commented:
thank you
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