WPI Surges on Energy and Metal Prices: Core Inflation Hits 3.88% as Select Commodities Drive Price Hike

The Wholesale Price Index (WPI) recorded a notable increase in March 2026, signaling renewed inflationary pressure across several key sectors. The annual rate of inflation, based on the All India WPI, stood at 3.88% for the month of March 2026 compared to March 2025. This rise was principally attributed to sharp increases in crude petroleum & natural gas, basic metals, and food articles.

Understanding the Macro Trend in Wholesale Prices​

For the month of March, 2026, the WPI registered a month-over-month (M-o-M) increase of 1.64% compared to February 2026. This upward movement suggests continued pricing momentum across wholesale markets. The overall index number for all commodities closed at 160.8, marking a substantial jump from 158.2 recorded in February 2026.

The data highlights that inflation remained a consistent concern, with the annual WPI inflation rate for the last six months showing a clear acceleration, culminating in the 3.88% mark for March 2026.

Primary Drivers Fueling WPI Inflation​

The upward swing in wholesale prices is segmented across several commodity groups, pointing specifically to raw material cost pressures. The most significant inflationary tailwinds came from the energy and primary article segments.

Primary Articles showed the sharpest annual inflation surge at 6.36%. This jump was largely spearheaded by crude petroleum & natural gas, whose annual inflation stood dramatically at 35.98%. Alongside this, minerals contributed to the index with an annual inflation rate of 3.22%.

In the energy sector, the Primary Articles group is particularly sensitive to petroleum prices. Crude petroleum alone recorded an annual inflation rate of 51.57% in March 2026, solidifying its role as the primary inflation catalyst.

Deep Dive: Primary Articles and Food Sector Movements​

Primary Articles, which constitute 22.62% of the total weight, showed a robust M-o-M increase of 2.28% for March 2026. While price spikes were visible in crude petroleum & natural gas, the food sector showed relative stability.

The WPI Food Index, weighted at 24.38%, remained largely steady, recording an annual inflation rate of 1.85%—identical to the previous month. This stability was driven by a slight marginal decrease in the index number from 192.9 in February 2026 to 192.8 in March 2026.

However, the component 'Onion' within the food group registered a substantial annual inflation rate of -42.11% (calculated over the preceding year), while 'Vegetables' recorded a modest 1.45% annual inflation, indicating varied pressure within the food supply chain.

Manufactured Products Show Mixed Price Signals​

The Manufactured Products segment, holding a weight of 64.23%, maintained a steady inflation rate of 3.39%. On a M-o-M basis, the index increased by 0.88%, indicating that manufacturers are passing on increased input costs.

Within this sprawling category, the data reveals a mixed sentiment. Sixteen groups saw price increases, while six groups experienced declines. Key growth areas included 'Mf/o Food Products' (annual inflation 1.83%) and 'Mf/o Basic Metals' (annual inflation 4.01%).

Conversely, sectors like 'Mf/o Wearing Apparel' and 'Mf/o Fabricated Metal Products, Except Machinery and Equipment' recorded negative M-o-M changes of -0.15% and -0.15% respectively, indicating cooling demand in these specific manufacturing segments.

Analysis of Fuel and Power Dynamics​

The Fuel & Power group saw its index increase by 4.13% in March 2026 (M-o-M). This momentum was primarily driven by Mineral Oils, which posted an annual inflation rate of 2.50%.

While the segment showed strong month-over-month gains, the underlying stability provided by components like LPG and HSD suggest that while cost pressures exist, they are not uniform across all energy inputs. The WPI data therefore paints a picture of differentiated inflationary pressures, with energy and metals leading the charges.