A központi bank is a national institution responsible for managing a country's currency, money supply, and interest rates. It plays a crucial role in maintaining economic stability and controlling inflation. Central banks also oversee the banking system and act as a lender of last resort during financial crises. In addition to regulating monetary policy, központi bankok often manage foreign exchange and gold reserves. They may also issue currency and ensure the stability of the financial system. Examples of central banks include the Federal Reserve in the United States and the European Central Bank in the Eurozone.