INDEX OF EIGHT CORE INDUSTRIES (BASE YEAR: 2011-12=100) FOR DECEMBER, 2025

1. At a Glance

• Index of Eight Core Industries (ICI) is a monthly production index for eight infrastructure-supporting industries, released by the Office of the Economic Adviser, DPIIT, Ministry of Commerce & Industry [S1][S2].
• Constitutes 40.27% of the weight of items in the Index of Industrial Production (IIP) — hence a leading directional indicator for IIP and industrial GDP [S1][S2].
• Frequently asked in Prelims (sector composition, weights, lead ministry) and Mains GS-III (industrial growth, infrastructure).

2. Why in the News

• ICI grew 3.7% (provisional) in December 2025 over December 2024, released on 20 January 2026 by PIB Delhi [S1].
• Final growth for November 2025 revised to 2.1% [S1].
• Five of eight sectors — Cement, Steel, Electricity, Fertilizers and Coal — recorded positive growth in December 2025 [S1].

3. Background & Evolution

• ICI first compiled with base 1993-94; revised to 2004-05, and currently to 2011-12=100, aligning with the new IIP series [S2][S3].
• Earlier covered six core industries; expanded to eight with inclusion of Fertilizers and Cement [S3].
• Compiled by the Office of the Economic Adviser (OEA), DPIIT, on a monthly basis with a one-month lag [S1][S2].

4. Core Static Facts

• Parent ministry: Ministry of Commerce & Industry → DPIIT → Office of the Economic Adviser [S1].
• Base Year: 2011-12 = 100 [S1][S2].
• Methodology: Laspeyres' fixed-base weighted arithmetic mean formula [S2].
• Combined weight in IIP: 40.27% [S1][S2].
• Eight sectors & individual weights (in ICI = 100): [S2]
• Petroleum Refinery Products — 28.04 (largest)
• Electricity — 19.85
• Steel — 17.92
• Coal — 10.33
• Crude Oil — 8.98
• Natural Gas — 6.88
• Cement — 5.37
• Fertilizers — 2.63 (smallest)
• Release frequency: Monthly; provisional figure for month n released in month n+1; final figure released after two months [S1].

5. Multi-Dimensional Analysis

Economic - ICI is a high-frequency lead indicator for the IIP and manufacturing GVA; the 3.7% December 2025 print signals moderate industrial momentum entering Q4 FY26 [S1]. - Sectoral divergence — five up, three down (implied: Crude Oil, Natural Gas, Refinery Products) — reflects the structural decline in domestic hydrocarbons output versus growth in infrastructure-linked materials (cement, steel, electricity) [S1].

Administrative / Statistical - Compiled by DPIIT/OEA, not by MoSPI (which compiles IIP) — a common confusion point [S1][S2]. - Used by RBI, Finance Ministry and NSO for monthly industrial monitoring and IIP forecasting.

Strategic - Hydrocarbons sector (Crude Oil + Natural Gas = ~15.86% weight) chronic underperformance feeds import dependence, raising current-account-deficit risk [S2]. - Strong electricity & cement growth aligns with PM Gati Shakti and National Infrastructure Pipeline capex push.

Methodological / Governance - Continued use of 2011-12 base year has been flagged as outdated; a new base-year revision (proposed 2017-18 / 2022-23) is pending alignment with NSO's IIP rebasing exercise [S2].

6. Recent Developments (last 12-18 months)

• 20 Jan 2026: December 2025 ICI provisional growth = 3.7% [S1].
• November 2025 final: 2.1% (revised) [S1].
• July 2025 and subsequent monthly releases published on PIB by DPIIT [S4].
• Cumulative growth for April-December (FY26 YTD) reported in Annex of the December release (referenced but not detailed in excerpt) [S1].

7. Prelims Hooks

• ICI base year: 2011-12 = 100 [S1].
• Combined ICI weight in IIP: 40.27% [S1].
• Compiling agency: Office of the Economic Adviser, DPIIT, Ministry of Commerce & Industry (not MoSPI) [S1].
• Highest-weight core industry: Petroleum Refinery Products (28.04%) [S2].
• Lowest-weight core industry: Fertilizers (2.63%) [S2].
• Cement weight: 5.37%; Steel weight: 17.92%; Electricity weight: 19.85% [S2].
• Number of core industries: 8 (Coal, Crude Oil, Natural Gas, Refinery Products, Fertilizers, Steel, Cement, Electricity) [S1].
• ICI December 2025 provisional growth: 3.7% [S1].
• November 2025 final ICI growth: 2.1% [S1].
• Index compiled using Laspeyres' formula [S2].
• Sectors with positive growth in Dec 2025: Cement, Steel, Electricity, Fertilizers, Coal [S1].
• Release pattern: provisional in next month; final after two months [S1].

8. Mains Relevance

• GS-III — Indian Economy: "Effects of liberalization on the economy, changes in industrial policy and their effects on industrial growth" and Infrastructure.
• Plausible question stems: 1. "Critically examine the utility of the Index of Eight Core Industries as a lead indicator of industrial activity in India. Suggest reforms." 2. "Despite buoyancy in cement, steel and electricity, India's core sector faces persistent weakness in hydrocarbons. Discuss the implications for energy security." 3. "Discuss the need for revising the base year of India's industrial indices."

9. Related Topics to Study Next

• Index of Industrial Production (IIP) — parent index; ICI is a sub-set.
• Wholesale Price Index (WPI) — also compiled by OEA, DPIIT.
• GVA vs GDP methodology — industrial GVA linkage.
• National Statistical Office (NSO) / MoSPI — for IIP, CPI, NAS.
• PM Gati Shakti / National Infrastructure Pipeline — drives core-sector demand.
• PLI Scheme (Steel, Specialty Steel) — sectoral push to steel index.
• National Coal Index and Natural Gas pricing reforms (Kirit Parikh Committee).
• National Statistical Commission base-year revision debate.

10. Common Errors / Trap Areas

• Wrong ministry: ICI is released by DPIIT (Commerce & Industry), NOT MoSPI [S1].
• Wrong base year: Current base is 2011-12, not 2004-05 or 2017-18 [S1][S2].
• Count error: Sometimes only "six core industries" recalled — current count is eight (Fertilizers and Cement were added) [S3].
• Weight confusion: Many wrongly assume Electricity has the largest weight — it is Petroleum Refinery Products (28.04%) [S2].
• Weight in IIP: 40.27%, not 40.27% of GDP — relates to IIP weight, not the economy [S1].

11. Sources

• [S1] INDEX OF EIGHT CORE INDUSTRIES (BASE YEAR: 2011-12=100) FOR DECEMBER, 2025 — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2216458 — (tier 1)
• [S2] A Note on Index of Eight Core Industries (ICI), Base year 2011-12 — https://eaindustry.nic.in/eight_core_infra/ICI_Compilation_Methodology.pdf — (tier 1)
• [S3] Index of Eight Core Industries (Base: 2011-12=100) — https://pib.gov.in/PressReleaseIframePage.aspx?PRID=1562086 — (tier 1)
• [S4] INDEX OF EIGHT CORE INDUSTRIES FOR NOVEMBER, 2025 — https://www.pib.gov.in/PressReleasePage.aspx?PRID=2207434 — (tier 1)