Core Inflation

Notes

Core inflation is headline inflation excluding the volatile components, food and fuel. In India it is usually measured as CPI inflation excluding food and beverages and fuel and light (sometimes also excluding petrol and diesel for transport). It captures the underlying, persistent price pressures in the economy.

Why it matters

Food and fuel prices swing because of supply shocks (monsoon, global oil), which are transitory and cannot be controlled by monetary policy. The central bank therefore watches the core to judge demand conditions and inflation expectations.
A high core suggests broad-based demand pressure and sticky inflation, which calls for monetary tightening.

Components of core: housing, clothing and footwear, education, health, transport and communication, recreation and personal care.

Measures

Core CPI (excluding food and fuel); WPI core (non-food manufactured products); trimmed mean and weighted median (statistical measures that remove extreme price changes).

Limitations

In India, food and fuel make up a large share of household consumption (food alone is close to half of the CPI basket), so excluding them does not reflect the cost of living of the poor.
Food prices can feed into wages and expectations (second-round effects), so they cannot be ignored entirely. The RBI targets headline CPI for this reason.
Fuel and food are sometimes persistent, not temporary.

Related terms: headline inflation (overall CPI), food inflation, services inflation.

Key Points

Core inflation = headline inflation excluding food and fuel.
Reflects underlying demand-side, persistent pressure.
Used by the RBI to see through transitory supply shocks.
In India, food has a big weight, so core understates the cost of living.
RBI's target is headline CPI, not core.

MCQs

Q1. Core inflation excludes:
(a) Housing and education
(b) Food and fuel
(c) Services
(d) Health
Ans: (b) .

Q2. Core inflation is useful for central banks because it:
(a) Is not affected by the monsoon and shows persistent price pressures
(b) Includes all prices
(c) Measures wholesale prices
(d) Is the legal inflation target in India
Ans: (a) .

Q3. The RBI's inflation target is based on:
(a) Core inflation
(b) Headline CPI
(c) WPI core
(d) GDP deflator
Ans: (b) .