New Delhi, Jan. 20 -- Output of eight core infrastructure industries grew 3.7% in December, its second straight month of expansion after a marginal contraction in October, official data showed on Tuesday.

Output volume growth of coal, crude oil, natural gas, refinery products, fertilizers, steel, cement and electricity had grown 5.1% in December 2024, and at an upwardly revised 2.1% in November 2025.

The commerce department said that these industries, having 40% weight in India's index of industrial output (IIP), had expanded 2.6% in the April to December period this fiscal, against 4.5% in the year ago period.

Latest data showed that out of the eight industries, the output of coal, fertilizer, steel, cement and electricity expanded in...