Consumer Price Index (CPI) Inflation measures the year-on-year change in the cost of a representative basket of goods and services bought by Indian households. CPI is the inflation gauge the RBI's Monetary Policy Committee formally targets at 4% +/- 2% under the flexible inflation-targeting framework.
India's CPI structure (current basket, 2012 base):
- Food and Beverages: ~45.9% weight
- Housing: ~10.1%
- Fuel and Light: ~6.8%
- Clothing and Footwear: ~6.5%
- Miscellaneous (transport, education, health, recreation): ~30.7%
NSO releases the all-India CPI around the 12th of every month. Food's high weight makes Indian CPI particularly sensitive to monsoon, vegetable prices, and supply shocks.
Example: If the CPI index level rises from 178.5 in May 2025 to 187.2 in May 2026, headline CPI inflation = (187.2 - 178.5) / 178.5 x 100 = 4.87% YoY.
Core vs Headline:
- Headline CPI includes all components, food and fuel.
- Core CPI excludes food and fuel — typically more stable, considered a better gauge of underlying demand-side inflation.
Why investors track CPI:
- The RBI sets the repo rate primarily in response to CPI projections.
- Equity markets dislike inflation surprises — a sustained CPI above the 6% upper band typically triggers rate hikes and tighter financial conditions.
- Real returns on debt instruments are computed as nominal yield minus CPI inflation. A 7% FD with 5% inflation gives a 2% real return (pre-tax).
Related: Repo Rate, WPI Inflation, Inflation-Indexed Bond, Indexation Benefit.
Disclaimer: Educational content from MintByte (ARN-314872, MFD). For latest CPI data see mospi.gov.in. SEBI Investment Adviser registration is in process.