In finance, an exchange rate is the rate at which one currency will be exchanged for another currency.[1] Currencies are most commonly national currencies, but may be sub-national as in the case of Hong Kong or supra-national as in the case of the euro.[2] The exchange rate is also regarded as the value of one country's currency in relation to another currency.[3] For example, an interbank exchang
![Exchange rate - Wikipedia](https://cdn-ak-scissors.b.st-hatena.com/image/square/472487210ae5ca2a9089aabd0a93edb619aa33a4/height=288;version=1;width=512/https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fd%2Fd4%2FMoney-Euro-USD-LEI_53073-480x360_%25284791385567%2529.jpg)