International Reserve Currency

An international reserve currency is a currency held in significant quantities by central banks and monetary authorities as part of their foreign exchange reserves. It must be widely trusted and usable for international payments, intervention, investment and the settlement of cross-border obligations, making international acceptability central to its status.

Strength of the issuing economy

• A large economy with a substantial share in world trade and finance creates broad transactional demand for its currency.
• Sustained macroeconomic stability, including credible monetary policy and manageable inflation, helps preserve the currency's purchasing power.
• Political stability and confidence in the issuer's institutions reduce the perceived risk of holding assets denominated in its currency.
• Currency convertibility and relatively open capital transactions allow foreign monetary authorities to acquire, hold and deploy the currency.

Financial markets and institutional foundations

Reserve managers need assets that can be bought or sold quickly, in large volumes and without sharply changing their price.

• The issuer must possess deep and liquid financial markets, particularly a large market for high-quality government securities.
• An ample supply of safe assets enables central banks to store reserves while preserving liquidity and capital value.
• Strong rule of law, protection of property rights and predictable regulation reinforce confidence in currency-denominated assets.
• Efficient payment, clearing and settlement systems make the currency convenient for trade, borrowing and financial transactions.

International use and network effects

Reserve-currency status becomes self-reinforcing through network effects: widespread use for trade invoicing, payments and borrowing makes further use cheaper and more convenient.

• Broad acceptance by private traders, banks, investors and governments increases the currency's liquidity and usefulness.
• The issuer must supply enough liquid liabilities to meet global demand without undermining confidence in their value.
• This creates the Triffin dilemma, a tension between supplying international liquidity and maintaining long-term confidence in the currency.