The account statement which summarizes the transactions of a country’s citizens with foreigners is commonly called the balance of payments.
Balance of Payments Accounting Identity
Current Account Balance + Financial Account Balance + Reserve Balance = 0
Current Account Balance
Composed of a country’s net exports for goods and services (is negative when exports > imports), net income from investments, and net current transfers (primarily foreign aid, foreign military support, and charity).
Financial or (Capital) Account Balance
Composed of direct investments, financial asset investments, bank assets liabilities, and a statistical discrepancy.
The statistical discrepancy is typically small in amount and serves as a plug value to tie the identity to 0 (zero).
Reserve Account Balance
Consists mostly of a government’s foreign currency holdings, but could also include inter-governmental exchange of gold.
If the value on the reserve account balance is positive, then a government has sold official reserve assets to buy back domestic currency.
Using Monetary Policy
A country’s central bank may ease monetary policy by increasing the money supply, with the objective of stimulating the economy. The theoretical sequence of events is:
Using Fiscal Policy
A government may also use fiscal policy (taxing and spending) to stimulate the economy and this also has implications for interest rates, the balance of payments and the domestic currency valuation.