An exchange rate is the price of one currency expressed in terms of another, determining how much of one monetary unit is required to purchase a unit of the other. Exchange rates are set in foreign-exchange markets through supply and demand, influenced by interest rates, inflation, trade balances, and central-bank policy, and may float freely, be pegged, or be managed. In crypto and stablecoin contexts the same concept governs the peg between a token and a fiat reference. Exchange rates are fundamental to international trade, monetary policy transmission, and cross-border value transfer.
Overview
- Exchange rates translate value between distinct monetary systems and are determined continuously in the world’s largest financial market, the foreign-exchange (forex) market.
- A rate may be quoted directly or indirectly, and regimes range from free floats, where the market clears the rate, through managed floats to hard pegs maintained by central-bank intervention.
- Drivers include relative interest rates, inflation differentials (purchasing-power considerations), trade and capital flows, and market expectations about future policy.
Key aspects
- Spot versus forward rates: the immediate settlement price versus contractually agreed future rates used for hedging.
- Regime types: floating, pegged, and managed-float arrangements, each with distinct policy trade-offs.
- Transmission: exchange-rate movements feed into import prices, inflation, and the competitiveness of exports.
- Pegs and stablecoins: maintaining a fixed exchange rate, whether by reserves or by an on-chain peg mechanism, requires credible backing and intervention capacity.
Applications
- Pricing cross-border trade and remittances.
- Hedging currency risk with forwards, futures, and options.
- Anchoring stablecoin value to a fiat reference via a peg mechanism.