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Exchange Rate

In finance, the exchange rate between two currencies specifies how much one currency is worth in terms of the other. For example an exchange rate of 120 Japanese yen (JPY, ¥) to the United States dollar (USD, $) means that JPY 120 is worth the same as USD 1. An exchange rate is also known as a foreign-exchange rate, forex rate or FX rate. The foreign exchange market is one of the largest markets in the world. By some estimates, about USD 2 trillion worth of currency changes hands every day.

An exchange rate quotation is given by stating the number of units of a price currency that can be bought in terms of 1 unit currency. For example, in a quotation that says the EUR-USD exchange rate is 1.2 USD per EUR, the price currency is USD and the unit currency is EUR.

Quotes using a country's home currency as the price currency are known as direct quotation or price quotation (from that country's perspective) ([1]) and are used by most countries.

Quotes using a country's home currency as the unit currency are known as indirect quotation or quantity quotation and are used in British newspapers and are also common in Australia, New Zealand and Canada.
direct quotation: Home Currency / Foreign Currency
indirect quotation: Foreign Currency / Home Currency

Note that, using direct quotation, if a unit currency is strengthening (i.e. appreciating, or becoming more valuable) then the exchange rate number increases. Conversely if the price currency is strengthening, the excange rate number decreases and the unit currency is depreciating.

If a currency is free-floating, its exchange rate is allowed to vary against that of other currencies. Exchange rates for such currencies are likely to change almost constantly as quoted on financial markets, mainly by banks, around the world. If the value of the currency is "pegged" its value is maintained by the government in question at a fixed rate relative to the other currency. In 1983 the Hong Kong dollar was linked to the United States dollar.

Fluctuations in exchange rates

A market based exchange rate will change whenever the values of either of the two component currencies change. A currency will tend to become more valuable whenever demand for it is greater than the available supply. It will become less valuable whenever demand is less than available supply (this does not mean people no longer want money, it just means they prefer holding their wealth in some other form, possibly another currency).

Increased demand for a currency is due to either an increased transaction demand for money, or an increased speculative demand for money. The transaction demand for money is highly correlated to the country's level of business activity, gross domestic product (GDP), and employment levels. The more people there are out of work, the less the public as a whole will spend on goods and services. Central banks typically have little difficulty adjusting the available money supply to accommodate changes in the demand for money due to business transactions.

The speculative demand for money is much harder for a central bank to accommodate but they try to do this by adjusting interest rates. An investor may choose to buy a currency if the return (that is the interest rate) is high enough. The higher a country's interest rates, the greater the demand for that currency. It has been argued that currency speculation can undermine real economic growth, in particular since large currency speculators may deliberately create downward pressure on a currency in order to force that central bank to sell their currency to keep it stable (once this happens, the speculator can buy the currency back from the bank at a lower price, close out their position, and thereby take a profit).

In choosing what type of asset to hold, people are also concerned that the asset will retain its value in the future. Most people will not be interested in a currency if they think it will devalue. A currency will tend to lose value, relative to other currencies, if the country's level of inflation is relatively higher, if the country's level of output is expected to decline, or if a country is troubled by political uncertainty. For example, when Russian President Vladimir Putin dismissed his Government on February 24, 2004, the price of the Ruble dropped. When China announced plans for its first manned space mission, synthetic futures on Chinese yuan jumped (since China's currency is officially pegged, synthetic markets have emerged that can behave as if the yuan was floating).

Like the stock exchange, money can be made or lost on the foreign exchange market by investors and speculators buying and selling at the right times. Currencies can be traded at spot and foreign exchnge options markets. The spot market represents current exchange rates, whereas options are derivatives of exchange rates.

See also

• Foreign Exchange Market
• Currency
• Euro

• Foreign Exchange Options
• Commodity
• Currency Future
• Futures Contract
• Futures Exchange
• Basis Point
• Interest Rate
• Investment

• Summary Measures of the Foreign Exchange Value of the Dollar
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• Earning Money From Forex

Continuous linked settlement
Financial instruments
Gold standard
Table of historical exchange rates
Currency Pair

This article is licensed under the GNU Free Documentation License.
It uses material from the Wikipedia article "Exchange Rate ".