Context: The Index of Eight Core Industries grew at 1.7% in June 2025, as compared to 5% in June 2024. IIP had registered a growth of mere 0.5% in April 2025, its lowest in the last eight months. The output of eight core infrastructure sectors makes up 40% of the country's industrial production.
Relevance of the Topic: Prelims: Key facts about Index of Eight Core Industries.

Index Of Eight Core Industries
- Index of Eight Core Industries (ICI) measures combined and individual performance of production of eight core sectors in India, comprising- coal, crude oil, natural gas, petroleum refinery products, fertilisers, steel, cement and electricity.
- These eight core industries constitute 40.27% of the total index of industrial production (IIP).
- This index is prepared by the Office of the Economic Advisor, Ministry of Commerce and Industry.
- It is published monthly with the base year as 2011-12.
Weightage of different sectors in the Index:

- Highest Weightage: Refinery products.
- Lowest Weightage: Fertilisers.
