Office of Economic Adviser to Release Revised Index of Core Industries Series with Base Year 2022–23

1. At a Glance

• OEA (DPIIT) will release a revised ICI series with base year 2022–23, replacing the 2011–12 base, on 20 July 2026, 5:00 PM [1].
• Core industries expand from Eight to Nine with the addition of Iron Ore [1].
• Release bundles the provisional ICI for June 2026 plus a back series (April 2023–May 2026, 38 months) [1].
• Relevant for Prelims (index terminology, base year rebasing) and Mains GS-III (industrial growth measurement, statistical reform).

2. Why in the News

• OEA/DPIIT announced (17 July 2026) the scheduled release of the rebased ICI on 20 July 2026, aligning it with the new IIP 2022–23 series already notified [1].

3. Background & Evolution

• ICI tracks the "core" infrastructure/basic-goods industries that feed into the broader Index of Industrial Production (IIP) [1].
• Previous ICI base year: 2011–12, covering Eight Core Industries — Coal, Crude Oil, Natural Gas, Refinery Products, Fertilizers, Steel, Cement, Electricity [2].
• MoSPI released the new IIP series with base year 2022–23 (first press release), and the ICI rebasing follows this to maintain methodological consistency [1].
• ICI is compiled monthly by OEA, DPIIT [1].

4. Core Static Facts

5. Multi-Dimensional Analysis

Economic

• ICI is a high-frequency leading indicator of industrial and infrastructure sector momentum, used by RBI/MoF for growth assessment.
• Rebasing to 2022–23 better reflects current economic structure (post-COVID, changed energy/steel mix) than the outdated 2011–12 base.

Administrative/Governance

• Coordination between OEA (ICI) and MoSPI (IIP) needed since ICI weights are derived from IIP — reflects inter-departmental statistical alignment [1].
• Methodological cleanups (dropping duplicate coal categories, switching steel to gross production) improve data integrity but require careful back-series recompilation.

Scientific/Statistical

• Base-year revision exercises are periodic (past pattern: 1993–94 → 2004–05 → 2011–12 → 2022–23) to keep weights representative of current production structures.
• Pro-rata redistribution of weights is a standard index-construction technique when altering the basket composition.

6. Recent Developments (last 12–18 months)

• MoSPI released the new IIP series with base year 2022–23 (first press release) [1].
• OEA/DPIIT announced (17 July 2026) the revised ICI series with base 2022–23, to be released 20 July 2026 [1].
• Monthly ICI releases continued on the old 2011–12 base through mid-2026 (e.g., April 2026 release) pending the switch [1].

7. Prelims Hooks

• ICI is compiled by the Office of Economic Adviser (OEA), under DPIIT, Ministry of Commerce & Industry — not MoSPI [1].
• New ICI base year: 2022–23; old base year: 2011–12 [1].
• Number of core industries increased from 8 to 9 with Iron Ore added [1].
• The revised series releases on 20 July 2026 [1].
• Back series covers April 2023 to May 2026 (38 months) [1].
• Provisional ICI figure included for June 2026 [1].
• Under the old series, 8 Core Industries weighed 40.27% of the IIP basket [2].
• Old 8 Core Industries: Coal, Crude Oil, Natural Gas, Refinery Products, Fertilizers, Steel, Cement, Electricity [2].
• In the revised methodology, only Raw Coal is counted (Coal Middlings, Washed Coal dropped) [1].
• Steel index now uses gross production data (previously net production) [1].
• ICI weights are derived from the IIP 2022–23 series and redistributed pro-rata to total 100 [1].
• ICI is released monthly [1].

8. Mains Relevance

• GS-III: Indian Economy — growth, industrial policy, infrastructure; also Statistics/Economic Survey-adjacent indicators.
• Syllabus heading: "Indian Economy and issues relating to planning, mobilization of resources, growth, development" / industrial policy.
• Possible question stems: 1. "Discuss the significance of periodic base-year revision of economic indices such as IIP and ICI for policy-making in India." 2. "Examine the rationale behind expanding the Index of Core Industries from eight to nine industries. What does the inclusion of Iron Ore indicate about India's industrial structure?" 3. "How do infrastructure/core-sector indices like the ICI aid in assessing the health of the Indian economy vis-à-vis other indicators like IIP and GDP?"

9. Related Topics to Study Next

• Index of Industrial Production (IIP) — new base year 2022–23, directly linked since ICI weights derive from it [1].
• New GDP series with base year 2022–23 — part of the same statistical modernization wave [context, general knowledge].
• National Statistical Office (NSO) / MoSPI — parent statistical machinery of India.
• Wholesale Price Index (WPI) / Consumer Price Index (CPI) — other rebased economic indices, useful for comparison.
• National Steel Policy / National Mineral Policy — relevant given Iron Ore's new inclusion.
• DPIIT's broader mandate — industrial policy, Ease of Doing Business, Make in India.
• Periodic Labour Force Survey (PLFS) — another MoSPI statistical product illustrating base-year/methodology updates.

10. Common Errors / Trap Areas

• Confusing OEA/DPIIT (compiles ICI) with MoSPI/NSO (compiles IIP, CPI, GDP) — different ministries.
• Assuming ICI still has 8 industries — now 9 with Iron Ore added.
• Mixing up base year of ICI (2022–23 revised) with GDP's new base year (also 2022–23) — same year, different indices, separate release processes.
• Assuming the old 8-industry weight in IIP (40.27%) carries over unchanged to the new series — weights are recalculated and redistributed pro-rata.
• Confusing Steel's gross vs net production methodology change — revised series uses gross.