What monetary policy is
Monetary policy is the use by the central bank of the interest rate, the money supply and (in some economies) the exchange rate to influence total demand and pursue macroeconomic aims. The central bank is a government-owned bank that operates monetary policy, issues notes, and is banker to the government and lender of last resort to commercial banks. Monetary policy works mainly by changing the cost and availability of borrowing.
Expansionary vs contractionary
Expansionary (loose) monetary policy fights unemployment: cut the interest rate and/or raise the money supply → cheaper borrowing → households spend and firms invest more → total demand rises. Contractionary (tight) monetary policy controls inflation: raise the rate and/or reduce the money supply → spending and borrowing fall → total demand falls, easing demand-pull inflation. A rate cut that lifts growth can also raise inflation.
Transmission and conflicts
One interest-rate change can pull the aims apart. A cut in rates makes borrowing cheaper → spending and investment rise → total demand rises → higher output and employment. But extra demand can cause demand-pull inflation, more spending goes on imports (worsening the current account), and the currency can depreciate. A rise in rates reverses this: it controls inflation but slows growth. So a discuss must weigh the conflicting aims.
Drawn from real examiner reports.
Central bank vs commercial bank
When asked which institution runs monetary policy, do not describe an ordinary (commercial) bank taking deposits and lending to households — that is a commercial bank. The central bank is government-owned, operates monetary policy, issues notes, and is banker to the government and lender of last resort. Define it by ownership plus a monetary-policy role.
June 2022 Paper 2: when explaining the functions of a central bank, a number of candidates confused them with those of a commercial bank and wrote about providing loans to households and firms. November 2024 Paper 2: few candidates gave a clear definition of a central bank, and weak answers gave only a single activity without ownership and role.
Direction of the interest-rate effect
Do not reverse the interest-rate transmission. A cut in rates makes borrowing cheaper and saving less rewarding, so spending rises (it only falls for the few who live off large savings). A rise in rates raises the cost of borrowing, so firms invest less and growth slows — not more. Trace it: lower rates → more spending; higher rates → less.
November 2024 Paper 2: a common error was to state that a cut in interest rates would reduce consumer spending, which is unlikely except for those with large savings. June 2024 Paper 1: some candidates wrongly thought an increase in interest rates would encourage investment and lead to higher economic growth.
Monetary policy is not fiscal policy
Monetary and fiscal policy both affect total demand, so they get muddled. Monetary policy = the central bank changing interest rates, the money supply or the exchange rate. Fiscal policy = the government changing spending and taxation. Do not treat an interest rate as a tax rate — different tools, different bodies.
June 2024 Paper 2: weaker answers confused monetary policy (e.g. changes in interest rates) with fiscal policy. November 2024 Paper 2: in one part candidates confused interest rates with tax rates. June 2023 Paper 1: a multiple-choice question required candidates to distinguish monetary-policy measures from fiscal-policy measures.
Rates move the currency and current account
A rate change does more than affect domestic spending. A cut in rates can depreciate the currency and, by raising demand, pull in more imports — worsening the current account of the balance of payments. A rise can appreciate the currency, making exports dearer. Do not treat monetary policy as if it only affected growth and inflation at home.
Match the policy to the problem
Match the policy to the aim. Expansionary (loose) monetary policy — lower rates, more money supply — fights unemployment and recession. Contractionary (tight) monetary policy — higher rates, less money supply — fights inflation. Recommending a rate cut to cure inflation, or a rate rise to cure unemployment, reverses the answer.
Analyse = one chain; discuss = conflict
Analyse: build ONE sustained chain (rate cut → cheaper borrowing → more spending → higher total demand) and stop — no judgement. Discuss: show the conflict between aims (a rate cut lifts growth but risks inflation), then a conditional judgement.
Stay on the transmission chain
Keep to the transmission chain — rate change → borrowing → spending → total demand → the aim. Do not drift into the effect on banks or the government's own interest costs, which loses focus and marks.
Fix the direction before you write
Fix the direction before you write: lower rates make borrowing cheaper, so spending and investment rise; higher rates make them fall. Getting this backwards reverses the whole answer — state the direction of each link.
Monetary policy is the use by the central bank of the interest rate, the money supply and, in some economies, the exchange rate to influence total demand (aggregate demand) and so pursue the government's macroeconomic aims (economic growth, low unemployment, price stability and balance-of-payments stability).
| Instrument | What the central bank does |
|---|---|
| Interest rate | sets a base rate that influences what banks charge to borrow and pay to save (the most-examined tool) |
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