OCR A Level Economics: Monetary policy and inflation targeting (H460)

This guide covers the Monetary policy topic in the application of policy instruments content of the OCR A Level Economics (H460) specification, Version 3.0 (June 2026), for first assessment in 2021. It is macroeconomics content for Component 02, and the specification labels none of it as a separate stage. All figures below are invented. Country M and its currency, the mu, are illustrative.

Pair it with the revision notes and the practice questions. See also the OCR Economics hub, the checklist and the free diagnostics. For the multiplier and AD/AS, use the multiplier guide and the AD/AS guide.

What the specification asks for

Outcome	Section
Explain monetary policy instruments: interest rates, money supply, quantitative easing, exchange rates	1
Explain how they influence macroeconomic variables and performance	1 and 2
Explain the liquidity trap	3
Explain inflation rate targeting and how it affects the behaviour of economic agents	4
Explain and distinguish symmetric and asymmetric inflation targeting	5
Evaluate the effectiveness of monetary policy in achieving the government’s macroeconomic objectives	6
Explain how a central bank works to achieve its aims	7

1. The instruments

Monetary policy uses the cost and availability of money, and the exchange rate, to influence aggregate demand (AD).

Interest rates. The central bank sets a policy rate, the rate it pays or charges banks. Banks adjust the rates they charge borrowers and pay savers to follow it. In the UK, the Bank of England’s Monetary Policy Committee sets Bank Rate to meet the government’s inflation target. A rise in the policy rate works through several channels:

• Borrowing costs rise, so households cut credit-financed consumption and firms postpone investment.
• Saving pays more, so saving rises and spending falls.
• Asset prices such as houses and shares tend to fall, reducing wealth and confidence.
• Higher returns attract foreign funds, so the exchange rate tends to rise.

Worked example. A household has an interest-only mortgage of 150,000 mu. The rate on it rises from 3.0% to 4.2%. Annual interest was 150,000 × 0.030 = 4,500 and is now 150,000 × 0.042 = 6,300, an extra 1,800 a year, or 150 a month. If household income is 30,000, the extra cost is 6% of income. Multiplied across many borrowers, that is a large fall in disposable income and consumption.

Money supply. The central bank can influence the quantity of money and credit. Methods include buying or selling government bonds in the market, and changing the reserves banks must hold, which changes how much they can lend. Faster money growth lowers the cost of credit and raises AD. Slower growth does the opposite. Most modern central banks target interest rates rather than the money supply directly, because the demand for money is unstable.

Quantitative easing (QE). The central bank creates new electronic money and uses it to buy assets, usually government bonds, from financial institutions. The effects are:

• Bond prices rise and yields fall, lowering long-term borrowing costs.
• The sellers hold more money, which they may lend or use to buy other assets, raising asset prices and wealth.
• Bank reserves and the money supply increase.

Worked example. A bond has a face value of 100 mu and pays a coupon of 3 mu a year. Bought at 100, it yields 3/100 = 3.00%. Heavy central bank buying lifts the price to 104. The yield becomes 3/104 = 2.88%. New corporate and mortgage borrowing is priced off such yields, so it becomes cheaper.

Exchange rates. A central bank may influence the exchange rate through interest rate changes, or by buying or selling its own currency, which is intervention. When the currency depreciates, exports become cheaper for foreign buyers and imports dearer at home. Appreciation has the opposite effects.

Worked example. The mu rises from 2.00 to 2.20 foreign units (fu). The appreciation is (2.20 − 2.00)/2.00 = 10%. An export priced at 50 mu costs 100 fu before and 110 fu after, a 10% rise, so foreign demand falls. An import priced at 88 fu costs 88/2.00 = 44 mu before and 88/2.20 = 40 mu after, a 9.1% fall, so imports rise. Net exports fall and AD shifts left. Cheaper imports also lower the price of imported inputs.

2. Effects on macroeconomic variables

Because AD = C + I + G + (X − M), a monetary change shifts AD by changing C, I and net exports. The multiplier then magnifies the initial change.

Worked example. Country M cuts its policy rate. Consumption rises by 1.2 billion mu, investment by 0.8 billion, and a weaker mu raises net exports by 0.4 billion. Initial change in AD = 1.2 + 0.8 + 0.4 = 2.4 billion. The marginal propensity to withdraw is 0.4, so the multiplier is 1/0.4 = 2.5. Final change in output = 2.4 × 2.5 = 6.0 billion mu. With real GDP of 200 billion, that is 3.0%.

Effects on performance:

• Growth and unemployment. Lower rates raise AD, output and employment if there is spare capacity.
• Inflation. Higher AD pushes up prices as the economy nears full capacity. A cut in rates risks demand-pull inflation. A rise in rates reduces it.
• Balance of payments. A lower exchange rate tends to improve the current account, though the size depends on the elasticity of demand for exports and imports.
• Other variables. Rates also affect house prices, investment, saving and the exchange rate.

3. The liquidity trap

A liquidity trap is a situation where interest rates are so low, close to zero, that further cuts cannot stimulate spending. The reasons are:

• Households and firms expect rates to rise later, so they hold cash instead of bonds. The demand for money becomes perfectly elastic at the low rate.
• Banks cannot pass on cuts below zero without losing depositors, so lending rates stop falling.
• If confidence is low, firms will not invest even at very low rates.
• Falling prices make cash more valuable, so people delay spending.

Worked example. Country M’s policy rate is 0.25% and prices are expected to fall by 1.0% a year. The real rate is (1.0025/0.99) − 1 = 1.26%. Cutting the policy rate to zero makes it (1.00/0.99) − 1 = 1.01%, which is still positive and barely different. The cut achieves almost nothing.

Responses are QE, forward guidance, and fiscal policy. The last is covered in other units.

4. Inflation rate targeting and behaviour

Inflation rate targeting means the government or central bank announces a numerical inflation target and sets policy to meet it. In the UK the target is 2% on the Consumer Prices Index (CPI).

Worked example. Country M’s CPI index rises from 125.0 to 128.5. Inflation = (128.5 − 125.0)/125.0 × 100 = 2.8%. This is 0.8 percentage points above a 2% target, so a central bank would consider raising rates.

A credible target changes behaviour because it anchors expectations:

• Workers and unions. A wage claim reflects expected inflation plus productivity growth. With productivity growth of 1.5% and expected inflation of 2%, the claim is about 3.5%. If people expect 4%, it becomes 5.5%. A credible target keeps claims low and stops a wage-price spiral.
• Firms. They set prices and plan investment using expected inflation, so stable expectations make long-term planning easier.
• Lenders and savers. They accept lower nominal rates when they trust real returns, so long-term interest rates are lower.
• Consumers. They face less pressure to bring spending forward ahead of price rises.

If the bank loses credibility, expectations drift and inflation becomes harder to control.

5. Symmetric and asymmetric targets

A symmetric target treats misses above and below the target as equally serious. Inflation of 1% matters as much as 3% when the target is 2%. The UK target is symmetric.

An asymmetric target treats misses in one direction as worse. An example is a ceiling, such as “below 2%”, under which only overshoots count as failures.

Worked example. Country M’s target is 2% and inflation in five years is 1.2, 1.9, 2.7, 3.4 and 0.6%. The deviations are −0.8, −0.1, +0.7, +1.4 and −1.4 points. Under a symmetric target all five years matter, and the mean absolute miss is 4.4/5 = 0.88 points. Under a 2% ceiling only years 3 and 4 (2.7 and 3.4) are breaches.

	Symmetric	Asymmetric
Misses that count	Above and below	Mainly one side
Deflation risk	Taken seriously	May be ignored
Policy	Stimulates when inflation is too low	Little reason to stimulate

Symmetry gives the bank a reason to cut rates when inflation is too low. An asymmetric ceiling may produce a bias towards weak demand.

6. Evaluating effectiveness

For effectiveness:

• Rates can be changed quickly by a committee that is independent of elections.
• The tool is flexible and works on the whole economy.
• A credible target brings low, stable inflation, which supports planning and investment.

Against effectiveness:

• Time lags. The full effect on output and prices may take a year or more, so policy may act when conditions have already changed.
• Weak transmission. If households are cautious or already heavily in debt, a cut may not raise spending.
• Cost-push inflation. Higher rates reduce AD but do not fix a supply shock, and cutting demand can lower output.
• Liquidity trap. Near zero, rates are almost powerless.
• Uneven effects. Savers lose and borrowers gain when rates fall. Exporters are hurt by a high exchange rate.
• Side effects. Very low rates and QE can inflate asset prices and widen wealth inequality.
• Uncertainty. Forecasts of inflation and the output gap are imperfect.

Judgement. Monetary policy is most effective against demand-pull inflation, when expectations are anchored, and when rates are well above zero. It is weakest against cost-push shocks and in a liquidity trap. A strong answer states which conditions apply in the case given and weighs the evidence.

7. How a central bank works to achieve its aims

A central bank’s main aim is to meet the inflation target. Where the government sets it, the aim is also to support other objectives such as growth and employment. The usual process is:

1. Collect data on prices, output, wages, credit and the exchange rate.
2. Forecast inflation and the output gap over the next one to two years.
3. Compare the forecast with the target. A committee votes on the policy rate.
4. Announce the decision with reasons, since communication shapes expectations.
5. Use market operations to keep market rates near the policy rate. If rates are at their floor, use QE.
6. Review the outcomes at the next meeting and explain misses publicly.

Independence from government reduces the risk that rates are cut for electoral gain. It also needs accountability, so the bank publishes its reasoning.

Common errors

• Writing “higher interest rates cause inflation to fall” without a chain through C, I, net exports and AD.
• Mixing up nominal and real interest rates.
• Saying QE prints money for the government. The central bank buys bonds from financial institutions.
• Describing an exchange rate rise as helping exports.
• Treating a symmetric target as one where only overshoots matter.
• Ignoring time lags when evaluating.

Official syllabus

OCR, A Level in Economics (H460) specification, Version 3.0 (June 2026), for first assessment in 2021, Macroeconomics: application of policy instruments, Monetary policy.