Monetary sovereignty is the power of the state to exercise exclusive legal control over its currency and monetary policy. This includes the authority to designate a country's legal tender, control the money supply, set interest rates, and regulate financial institutions. Monetary sovereignty is crucial for national sovereignty, economic independence, and policy autonomy.

The degree of monetary sovereignty ranges widely from countries with high control over monetary systems to those who voluntarily gave up aspects to supranational organizations or adopted a foreign currency.

Monetary sovereignty has several key powers:

Legal tender authority: the exclusive authority to designate which forms of payment are legally acceptable for settling debts in a nation. This includes determining the official currency.

Issuance and retirement: the exclusive authority to control legal tender issuance and retirement.

Monetary policy independence: The ability to set interest rates and determine bank reserve requirements without external interference. This power includes responding to economic conditions with expansionary or contractionary measures.

Exchange rate management: The authority to set exchange rate policies, whether fixed or floating, and intervene in foreign exchange markets.

Financial system regulation: The power to regulate banks and other financial institutions, including acting as a lender of last resort, setting capital requirements, and supervising financial markets.