Basic Materials Sector: Beyond Metals & Minerals

The basic materials is one of the sector groups listed on the Indonesia Stock Exchange (IDX), comprising five industries.

Although there are five industries, the metals & minerals industry lead in terms of issuer count and drives the sectoral index most strongly. Key metals & minerals in this raw materials sector include:

• Gold

• Steel & Iron

• Copper

• Aluminum

• Tin, Nickel, etc.

Other mining companies—such as those extracting oil & gas or coal—are classified under the energy sector. Many mining stocks serve as major catalysts for the overall IDX Composite Index (IHSG).

Key Facts About the Raw Materials Sector

1. Industries in the basic materials sector include:

Industries	Number of Issuers
Metals & Minerals	37
Chemicals	30
Containers & Packaging	21
Forestry & Paper	13
Construction Materials	12
Total	113

2. The Basic Materials Sectoral Index (IDXBASIC) declined slightly in early 2025, but managed to jump 64.40% YTD as of December 30, 2025. Meanwhile, MTD, IDXBASIC increased by 3.79%.

3. As of December 2025, the average market capitalization of IDXBASIC constituents is IDR 20.92 trillion, with an average free float market capitalization of IDR 2.56 trillion. The constituent with the highest market capitalization on the index calculation is BRMS.

4. The basic materials sector plays an important role in the economy because it provides the materials needed by various industrial lines for the production of finished goods. Fluctuations in commodity prices, government policies, and other external factors can affect the performance of this sector.

5. Top 10 issuers of basic materials based on January 2026 index fact sheet:

Issuers	Industry
MDKA	Metals and Minerals
ANTM	Metals and Minerals
AMMN	Metals and Minerals
EMAS	Metals and Minerals
BRMS	Metals and Minerals
TPIA	Chemicals
MBMA	Metals and Minerals
INKP	Forestry & Paper
BRPT	Chemicals
INCO	Metals and Minerals

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Disclaimer: The content is made for educational purposes, not a recommendation to buy or sell a particular stock. PT KAF Sekuritas Indonesia is licensed and supervised by the Financial Services Authority (OJK).

Besides Metals & Minerals, which industries in the Basic Materials Sector do you typically invest in?

• Chemicals
• Containers & Packaging
• Forestry & Paper
• Construction Materials