What is an exchange rate?

An exchange rate is the price of one currency expressed in another. It affects tourism, imports, foreign debt and saving. Interpreting a rise or fall requires identifying which currency is being priced in which other currency.

How rates form and key distinctions

1. Reading the quotation If more lira are required to buy one dollar, the lira has depreciated against the dollar. An inverse quotation moves numerically in the opposite direction. Banks’ and exchange offices’ buying and selling spreads can produce different transaction outcomes from a single midpoint rate. 2. Supply and demand factors Trade payments, tourism, investment flows, expected interest rates and perceived risk affect currency supply and demand. News and position changes may generate rapid short-term movements. No single observation determines the future exchange rate with certainty. 3. Exchange-rate regimes Under floating arrangements, market conditions influence the rate, although central banks may intervene. Fixed or managed regimes involve particular commitments and rules. Their sustainability depends on reserves, policies and economic conditions.

How do exchange-rate changes affect the economy?

4. Nominal and real rates A nominal rate is the price between two currencies. Real measures also account for relative prices or costs. A real effective exchange rate combines several trading partners with weights. Its direction and base period must be understood before interpreting appreciation. 5. Imports, exports and prices Depreciation can make imported inputs more expensive. It may support export competitiveness, but imported inputs, foreign demand and production capacity constrain the effect. Exchange-rate changes do not pass into all consumer prices at the same speed or proportion. 6. Foreign-currency debt and matching Borrowers with local-currency income and foreign-currency debt can face higher repayment burdens after depreciation. Those earning foreign currency face different effects. Maturity, currency matching and hedging costs should be considered together. Past exchange-rate movements do not guarantee future returns.