Index Numbers of Wholesale Price in India for the Month of December, 2025 (Base Year: 2011-12)

1. At a Glance

• WPI measures the average change in prices of goods traded in bulk in the wholesale market; compiled and released monthly by the Office of the Economic Adviser, DPIIT, Ministry of Commerce & Industry, with current base year 2011-12 [1][3].
• For UPSC: a recurring Prelims data point and GS-III anchor for questions on inflation, monetary policy, and divergence with CPI.

2. Why in the News

• PIB release dated 14 January 2026 placed All-India WPI annual inflation at 0.83% (provisional) for December 2025 vs (-)0.32% in Nov-25 and (-)1.02% in Oct-25 — the first positive print after months of deflation/near-zero readings [1].
• Month-on-month WPI rose 0.71% over November 2025 [2].

3. Background & Evolution

• WPI series in India dates back to week ended 10 January 1942 (base year 1939). Successive base revisions: 1952-53 → 1961-62 → 1970-71 → 1981-82 → 1993-94 → 2004-05 → 2011-12 (current) [3].
• Current 2011-12 series introduced in May 2017; aligned base with GDP and IIP; excluded indirect taxes from price quotations to bring WPI closer to Producer Price Index (PPI) concept [3].
• A Working Group has been constituted to revise the series further to base 2022-23 [4].

4. Core Static Facts

• Issuing body: Office of the Economic Adviser, Department for Promotion of Industry & Internal Trade (DPIIT), Ministry of Commerce & Industry [1].
• Base year: 2011-12 = 100 [1].
• Total items: 697 in 2011-12 series (Primary 117, Fuel & Power 16, Manufactured 564) [3].
• Major group weights (as per release table): Primary Articles 22.62%, Fuel & Power 13.15%, Manufactured Products 64.23%; Food Index (composite) ~24.4% [1].
• Release lag: ~14th of every month; provisional figures finalised after 10 weeks (revision policy) [3].
• December 2025 indices (provisional): All Commodities 157.0 (inflation 0.83%); Primary Articles 194.2 (0.21%); other components reported in release [1].
• Drivers of Dec-25 positive print: prices of other manufacturing, minerals, manufacture of machinery & equipment, food products and textiles [1].

5. Multi-Dimensional Analysis

• Economic: Positive WPI after a deflationary patch signals revival in producer-level pricing power; relevant for GDP deflator computation and corporate margin analysis [1].
• Monetary policy: WPI is not the RBI's nominal anchor since 2016 — CPI-Combined (4% ± 2%) is. However, WPI divergence informs core inflation and supply-side assessments [3].
• Statistical/Methodological: 2011-12 series excludes indirect taxes → conceptually closer to PPI; weights are based on net traded value; uses Laspeyres formula [3].
• Administrative/Federalism: Item-basket revisions handled via Technical Review Committee under DPIIT for dynamic substitution of dormant sources [3].

6. Recent Developments (last 12-18 months)

• Dec 2025 (provisional): WPI inflation 0.83% [1].
• Nov 2025 (provisional): (-)0.32%; Oct 2025 (final): (-)1.02% [1].
• Working Group constituted to migrate WPI base from 2011-12 → 2022-23 [4].

7. Prelims Hooks

• WPI base year currently 2011-12; CPI base year 2012 [1][3].
• WPI released by Office of Economic Adviser, DPIIT — not by MoSPI (MoSPI releases CPI & IIP) [1][3].
• WPI excludes services; CPI includes services [3].
• Current WPI basket has 697 items with Manufactured Products weight 64.23% [1][3].
• WPI inflation for December 2025 = 0.83% [1].
• Food Index is a composite from Primary Articles (food) + Manufactured (food products) [1].
• 2011-12 series excludes indirect taxes unlike 2004-05 series [3].
• Provisional figures are revised after 10 weeks [3].
• WPI shifted from base 2004-05 → 2011-12 in May 2017 [3].
• RBI's monetary policy targets CPI-C, not WPI, since 2016 [3].

8. Mains Relevance

• GS-III: Indian Economy — Growth, Development, Inflation, Monetary Policy.
• Syllabus: "Indian Economy and issues relating to planning, mobilization of resources, growth" and "Inclusive growth and issues arising from it."
• Probable stems: 1. "Examine the rationale for using CPI rather than WPI as the nominal anchor for monetary policy in India." 2. "Discuss the methodological improvements in the 2011-12 WPI series and the case for further revision to base 2022-23." 3. "What does the divergence between WPI and CPI inflation reveal about transmission of price shocks in the Indian economy?"

9. Related Topics to Study Next

• CPI (Combined, Rural, Urban) — primary inflation gauge; MoSPI release.
• Producer Price Index (PPI) — proposed successor concept to WPI.
• GDP deflator — uses WPI as a major input.
• MPC & Inflation Targeting Framework (2016) — statutory 4±2% CPI target.
• IIP (base 2011-12) — sister index, also under base-revision exercise.
• Core inflation — non-food, non-fuel; relevant for both CPI & WPI analysis.
• Repo rate decisions of RBI MPC — interplay with inflation prints.
• Consumer Food Price Index (CFPI) — food-only counterpart inside CPI.

10. Common Errors / Trap Areas

• Confusing WPI issuer — it is DPIIT (Commerce Ministry), not MoSPI (which issues CPI/IIP) [1].
• Mistaking base year — WPI is 2011-12, CPI is 2012, IIP is 2011-12.
• Assuming WPI is the RBI's policy anchor — it is CPI-C since 2016.
• Treating WPI as inclusive of services — it covers only goods.
• Confusing the provisional vs final revision cycle (10 weeks).