Monetary Policy: Inflation Targeting

Inflation targeting is the cornerstone of the UK's monetary policy framework. Since 1992, when the UK adopted an explicit inflation target following its exit from the European Exchange Rate Mechanism (ERM), the framework has evolved into one of the most studied and widely imitated approaches to central banking in the world.

Key Definition: Inflation targeting is a monetary policy framework in which the central bank is given a specific, publicly announced numerical target for inflation and uses its policy instruments (primarily interest rates) to achieve that target over a defined time horizon.

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History of UK Inflation Targeting

Year	Development	Details
1990	New Zealand pioneers inflation targeting	First country to adopt an explicit CPI target (0-2%)
1992	UK adopts inflation targeting	After ERM exit ("Black Wednesday"), Chancellor Norman Lamont sets target of 1-4% RPIX
1995	Target refined	Target set at 2.5% RPIX or below
1997	Bank of England independence	Gordon Brown grants operational independence to the MPC; target remains 2.5% RPIX
2003	Switch to CPI	Target changed to 2% CPI (Consumer Prices Index), which excludes mortgage interest payments
Present	2% CPI symmetric target	Deviations above and below 2% are treated equally seriously

The shift from RPIX to CPI in 2003 was significant because CPI excludes housing costs (mortgage interest payments, council tax), making it a "purer" measure of consumer inflation and more internationally comparable. However, critics argue this means the target ignores a major component of the cost of living.

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How the Inflation Target Works

The Symmetric Target

The 2% CPI target is symmetric — the MPC treats inflation of 1% (below target) with the same concern as inflation of 3% (above target). This is important because it means the MPC will not only tighten policy to prevent inflation rising, but will also loosen policy to prevent inflation falling too far below target or turning into deflation.

The Open Letter System

If CPI inflation deviates by more than 1 percentage point from the 2% target (i.e., rises above 3% or falls below 1%), the Governor of the Bank of England must write an open letter to the Chancellor. The letter must explain:

1. Why inflation has deviated from target.
2. What the MPC proposes to do about it.
3. How long the MPC expects the deviation to persist.

Between 2007 and 2023, numerous open letters were written. Notably, Governor Mervyn King wrote several letters between 2007 and 2012 explaining above-target inflation driven by rising energy and commodity prices — factors largely outside the MPC's control.

Exam Tip: The open letter system enhances transparency and accountability. These are key evaluation points. Transparency means markets, businesses, and households can understand what the MPC is doing and why, which helps anchor expectations.

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The Role of Expectations

Inflation expectations are at the heart of modern inflation targeting. The theory, developed by economists including Kydland and Prescott (1977) and Barro and Gordon (1983), holds that if people expect inflation to be close to the target, their behaviour will help make that expectation self-fulfilling.

How Expectations Affect Inflation

• Wage bargaining: If workers expect inflation to be 2%, they will seek wage increases of around 2% plus any productivity growth. This prevents a wage-price spiral.
• Price setting: If firms expect input costs to rise by 2%, they will plan price increases of around 2%, incorporating the expected inflation into their business plans.
• Financial markets: If investors expect 2% inflation, they accept lower nominal interest rates on gilts, keeping the government's borrowing costs down.
• Consumer spending: Stable expectations reduce precautionary saving and support steady consumption growth.

Anchoring Expectations

The credibility of the inflation target — and of the MPC's commitment to achieving it — is essential for anchoring expectations. If expectations become de-anchored (people stop believing the central bank will deliver 2% inflation), a self-fulfilling inflationary or deflationary spiral can develop.

Example of de-anchoring risk: In 2022, when CPI inflation rose above 10%, there were concerns that persistently high inflation could shift long-term expectations upward. If workers began demanding wage increases of 8-10% to compensate for the cost of living, and firms passed these costs on in higher prices, a wage-price spiral could embed high inflation into the economy. The MPC raised interest rates aggressively (to 5.25%) partly to signal its determination to bring inflation back to target and prevent expectation de-anchoring.

Expectations Anchored	Expectations De-Anchored
Workers accept moderate wage rises	Workers demand large cost-of-living increases
Firms make small, predictable price adjustments	Firms raise prices pre-emptively to protect margins
Long-term interest rates remain low	Long-term interest rates rise (inflation risk premium)
MPC can respond flexibly to shocks	MPC must tighten aggressively, risking recession

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Forward Guidance

Forward guidance is a communication tool in which the central bank provides information about its future policy intentions. It was introduced by the Bank of England under Governor Mark Carney in August 2013.

Carney's Forward Guidance (2013)