The Index of Eight Core Industries (ICI) is often described as a bellwether for India's industrial health. Critically examine the structural limitations of ICI as a policy tool and suggest reforms to improve its coverage and timeliness.

Q. The Index of Eight Core Industries (ICI) is often described as a bellwether for India's industrial health. Critically examine the structural limitations of ICI as a policy tool and suggest reforms to improve its coverage and timeliness. (15 marks, 250-350 words)

The Index of Eight Core Industries, compiled by the Office of the Economic Adviser (DPIIT), covers 40.27% of the weight of items in the Index of Industrial Production [1], making it India's earliest monthly read on industrial momentum — but its narrow, energy-heavy design limits how far policy can lean on it.

Its strength as a bellwether - Tracks eight upstream inputs — coal, crude oil, natural gas, refinery products, fertilizers, steel, cement, electricity — whose output cascades into all downstream manufacturing [1]. - Released monthly, weeks ahead of IIP and GDP data, giving it genuine lead-indicator value.

Structural limitations - Hydrocarbon dominance: refinery products alone carry a 28.04% weight; with crude oil, gas and coal, fuels account for over half the basket [2]. In May 2026 the index grew only 0.5% because refinery (−8.7%) and coal (−9.3%) output fell, even as steel (+5%), cement (+8.4%) and electricity (+8.7%) expanded [1] — masking real construction-led demand. - Volume-only measure: it captures physical production, not value addition, prices, capacity utilisation or employment. - Coverage gaps: services, MSMEs, the informal sector and most downstream manufacturing lie outside it; returns are PSU-heavy. - Timeliness–accuracy trade-off: provisional estimates are routinely revised in the following month's release [1]. - Conceptual flaws: the old series double-counted coal, as washed coal and middlings derived from raw coal were separately included [3].

Reforms — some already under way - The revised ICI series with base year 2022-23, released on 20 July 2026, adds iron ore as a core industry, retains only raw coal to remove double counting, and provides a 38-month back series for comparability [3]. - Periodic, rule-based rebasing; weights redistributed pro-rata from the updated IIP basket [3]. - Supplement with GST, e-way bill and electricity-load data for faster, wider proxies; publish disaggregated, seasonally adjusted series.

ICI remains indispensable as an early-warning signal, but is a thermometer, not a diagnosis. Read alongside GST collections, PMI and capacity-utilisation surveys — and strengthened by the 2022-23 rebasing — it can evolve into a sharper instrument for evidence-based industrial policy.

(~330 words)

Sources: 1. INDEX OF EIGHT CORE INDUSTRIES (BASE YEAR: 2011-12=100) FOR MAY 2026, PIB — 40.27% weight in IIP; ICI +0.5% in May 2026; sectoral growth rates and weights; provisional-to-final revision cycle 2. A Note on Index of Eight Core Industries (ICI), Base Year 2011-12 — Office of the Economic Adviser, DPIIT — compilation methodology and item weights, including refinery products at 28.04% 3. Office of Economic Adviser to Release Revised Index of Core Industries Series with Base Year 2022–23, PIB — new base year, inclusion of iron ore, removal of coal double counting, 38-month back series, pro-rata weights from IIP 2022-23