Data doubts: On the latest IIP dataset

📌 Summary:

• Index of Industrial Production (IIP) grew 5.1% in May 2026 — a five-month high, up from 4.9% in April; manufacturing grew 5.5% (slower than April)
• Industry showed a quick bounce-back after the initial hit from the West Asia crisis
• Two competing explanations for the growth: (1) revival in domestic consumption — consumer durables and non-durables at multi-month highs; vs (2) it is export growth, not domestic demand, that is driving production
• Export-led argument backed by: GST revenues from domestic transactions grew slower over the last six months; merchandise exports hit a four-year high in April and an all-time high in May
• Concern: if growth is driven mainly by external demand, the economy remains hostage to world events
• MoSPI changed methodology — abandoned the Wholesale Price Index (WPI) as its deflator in favour of the new Producer Price Index (PPI), a more accurate approach
• Criticism: change made belatedly, not when the new series launched on June 1 — suggests an unsystematic approach by MoSPI
• Discrepancy: strong IIP does not reconcile with the Index of Eight Core Sectors, which grew at its second-lowest rate in 21 months — raising doubts about what is actually being measured

🎯 UPSC Relevance: GS3 Economy — industrial growth, reliability of statistical systems, and how the choice of deflator (WPI vs PPI) shapes real-growth estimates.

📝 Prelims Facts:

• IIP is released monthly by MoSPI / National Statistical Office (NSO)
• IIP May 2026: 5.1%; manufacturing 5.5%
• New deflator adopted = Producer Price Index (PPI), replacing the WPI
• Index of Eight Core Industries tracks eight core sectors and carries ~40% weight in the IIP

🔑 Key Term: Producer Price Index (PPI) — measures the average change in selling prices received by domestic producers for their output; used as a deflator to convert nominal production value into real terms.