Monetary policy is how central banks control money supply and interest rates to manage inflation, promote economic growth, and support employment. Central banks use three main tools: open market operations, reserve requirements, and discount rates.
How it works
Central banks adjust interest rates to influence borrowing and spending. Lower rates encourage borrowing and investment, stimulating the economy. Higher rates curb inflation by reducing spending. Central banks also expand or contract the money supply—expanding it to spur activity, contracting it to fight inflation. Interest rates and money supply changes also move exchange rates: higher rates attract foreign investment, strengthening the currency.
Impact on forex trading
Monetary policy directly moves forex markets. When a central bank signals interest rate increases, traders anticipate a stronger currency and adjust positions. Currency pairs move in advance of and in reaction to policy decisions.
Challenges and lag
Monetary policy takes time to work—often months or quarters pass before the full effects appear on the economy. Market reactions to policy decisions are unpredictable; traders' expectations matter as much as the policy itself. In severe downturns when rates are already near zero, central banks lose traditional tools to stimulate the economy. Additionally, one country's policy can ripple globally, affecting multiple currency pairs.
