How exchange rates work

What an exchange rate is

An exchange rate is simply the price of one currency measured in another. When you see EUR/USD quoted at 1.08, it means one euro is worth 1.08 US dollars. The same relationship read the other way says one dollar is worth about 0.93 euros. There is nothing more mysterious to it than that: a rate is a price, and like any price it reflects what buyers and sellers agree something is worth right now.

What makes currencies feel complicated is that the "something" being priced is itself money, and that price is always quoted relative to another currency. There is no absolute value of a dollar floating in space; there is only the dollar measured against the euro, the yen, the pound, and so on.

Where rates come from: the FX market

Exchange rates are set in the foreign-exchange market (often shortened to forex or FX), the largest financial market on earth, where trillions of dollars change hands every day. Banks, multinational companies, governments, funds, and traders continuously buy and sell currencies, and the balance of all that buying and selling is what produces a rate.

When more participants want to hold euros than want to sell them, the euro is bid up and strengthens. When sentiment turns and people sell, it weakens. Because this activity happens continuously across global time zones, rates update every few seconds during the trading week. The figure is a living number, not a fixed one a bank decides each morning.

Floating, fixed, and pegged currencies

Not all currencies are set the same way. Most major currencies float: their value is decided entirely by the market, free to rise and fall minute by minute. The US dollar, euro, British pound, and Japanese yen all float.

Other currencies are fixed or pegged: a government or central bank ties the currency's value to another currency (often the US dollar) and actively intervenes to keep it there. Some countries use a managed float, letting the currency move within a band while stepping in if it drifts too far. These choices explain why some currencies barely budge against the dollar while others swing freely.

What makes a currency rise or fall

A floating currency's value is the net result of many forces acting at once. The most influential:

• Interest rates. Higher rates reward people for holding a currency, attracting capital and tending to strengthen it. Cuts tend to weaken it.
• Inflation. A currency losing purchasing power at home tends to lose value abroad too.
• Economic strength. Strong growth, employment, and trade data signal a healthy economy and support its currency.
• Trade balance. Countries that export more than they import see steady foreign demand for their currency.
• Risk sentiment. In nervous times, money flows to "safe haven" currencies such as the dollar, Swiss franc, or yen.
• Expectations. Markets price in the future, so a change everyone anticipated may move a rate less than a small surprise.

Because these factors interact and sometimes pull in opposite directions, short-term currency moves are very hard to forecast, even for professionals with deep resources.

How to read a currency quote

A quote always involves two currencies: the base and the quote. In EUR/USD, the euro is the base (the currency being priced) and the dollar is the quote (the currency it is priced in). The number tells you how many units of the quote currency equal one unit of the base.

To convert an amount, multiply by the rate when going from base to quote, and divide when going the other way. For example, with EUR/USD at 1.08, converting 100 euros to dollars gives 100 × 1.08 = 108 dollars, while converting 108 dollars back to euros gives 108 ÷ 1.08 = 100 euros. Currvo handles this arithmetic for you and, for cross-currency conversions, routes through a common reference so the result stays consistent.