Last updated on September 12th, 2026 at 05:16 pm
Tata, Mahindra, Suzuki, and Mercedes all sell the same underlying good — cars. When a large number of players sell essentially the same product or service, that collection of firms is called an industry. By the end of this read, you will know what is meant by the term industry
More formally, an industry is a group of businesses that produce similar goods or services, use comparable inputs, and serve overlapping customer needs. Firms within an industry are often close substitutes for one another — think carbonated beverages, fruit juices, and bottled water. Each satisfies a similar underlying need (a cold, refreshing non-alcoholic drink), which is why they compete with each other even though their products aren’t identical.
Why Industry Classification Matters
Grouping companies into industries isn’t just an academic exercise — it has three concrete, practical uses:
- Economic measurement. National and international statistical agencies use industry classification to track production value, employment, and GDP contribution by sector.
- Investment analysis. Equity research analysts and portfolio managers use industry classification to compare companies on a like-for-like basis — margins, growth rates, and valuation multiples only mean something when compared within the same industry, since a 15x P/E is cheap for an IT services firm and expensive for a commodity producer. No comparable-company analysis or sector report is built without first anchoring the peer set to a shared classification.
- Credit and lending decisions. Banks use industry classification to assess sector-level risk before choosing which borrowers to prioritize, since default rates and cyclicality vary meaningfully across industries.
This is the kind of industry-mapping work covered hands-on in a financial modeling course, where you build sector-specific assumptions into a working model rather than just reading definitions of them.
Basic Classification of Industries
Classifying Industries by Source of Raw Material
One traditional way to classify industries is by where their raw material comes from:
- Extractive industries draw raw material directly from nature — agriculture, mining, and fishing are examples.
- Non-extractive (manufacturing) industries source raw material from other producers and convert it into new goods — plywood manufacturing, metal processing, and textile spinning fall here.
- Facilitating (service) industries don’t produce physical goods at all; they provide services that support other businesses and consumers — banking, tourism, and trading are examples.
Classifying Industries by Capital Intensity
Industries can also be grouped by how much capital investment they require to operate:
- Heavy industry requires large upfront investment in machinery and equipment — steel, heavy engineering, and automobile manufacturing are classic examples.
- Light industry requires comparatively little capital and tends to be more labor-intensive — the restaurant and apparel industries are typical examples.
Classifying Businesses by Scale: The MSME Framework (India)
A more rigorous, India-specific way to classify enterprise size is the Micro, Small and Medium Enterprises (MSME)framework under the MSMED Act, 2006. As of the most recent revision (effective April 2025), classification is based on both investment in plant/machinery and annual turnover — a business must satisfy both thresholds to qualify for a given category:
| Category | Investment Limit | Turnover Limit |
|---|---|---|
| Micro Enterprise | Up to ₹2.5 crore | Up to ₹10 crore |
| Small Enterprise | Up to ₹25 crore | Up to ₹100 crore |
| Medium Enterprise | Up to ₹125 crore | Up to ₹500 crore |
Enterprises above these thresholds are classified as large enterprises. This is the classification system actually used for MSME loan eligibility, government incentives, and Udyam registration in India — not an employee-headcount system, which is a common misconception.
Classifying Industries by Type of Output
Industries are also grouped by the finished state of the goods they produce:
- Primary industry produces finished goods ready for direct consumption or use — the food and beverage industry is an example.
- Secondary industry produces intermediate goods that require further processing before use — the steel and fiber-spinning industries fall here.
- Tertiary industry comprises service providers — banking, insurance, and trading companies.
Industries are further distinguished by their position in the supply chain: upstream industries (like plywood, aluminum, and steel producers) supply raw or semi-processed material to other industries, while downstream industries (like automobile and electronics manufacturers) convert that material into finished goods for end consumers.
How Financial Markets Classify Industries
The classifications above are useful conceptually, but professional equity research, portfolio management, and financial modeling rely on two standardized systems that go much further in granularity.
GICS (Global Industry Classification Standard)
Developed jointly in 1999 by MSCI and S&P Dow Jones Indices, GICS is the classification framework used across global equity markets for sector-based investing, index construction, and comparable-company analysis. It’s a four-tier hierarchical structure:
- 11 Sectors (e.g., Financials, Information Technology, Health Care)
- 25 Industry Groups
- 74 Industries
- 163 Sub-Industries
Each company is assigned to a single sub-industry based primarily on where its revenue comes from, and that sub-industry classification automatically determines its industry, industry group, and sector. For example, an investment bank would be classified as: Sector → Financials, Industry Group → Diversified Financials, Industry → Capital Markets, Sub-Industry → Investment Banking & Brokerage. Any analyst building a comps table or sector index in a global context is almost certainly working within this framework.
NSE/BSE Industry Classification (India)
For Indian equities, NSE and BSE have jointly used a unified classification system (via NSE Indices Ltd.) since November 2022. It also follows a four-tier structure, though with different granularity than GICS:
- 12 Macro-Economic Sectors
- 22 Sectors
- 59 Industries
- 197 Basic Industries
This is the classification structure behind sectoral indices you’ll recognize from the market — Nifty Bank, Nifty IT, Nifty Pharma, and so on — and it’s reviewed annually, with companies reclassified if their core business changes materially (for instance, after a merger or demerger).
Why This Matters If You’re Building Models or Research Reports
If you’re training for a career in equity research or financial modeling, GICS and NSE/BSE classification aren’t background trivia — they’re the starting point of almost every analytical workflow: picking a peer set for valuation, building a sector-relative model, or writing an industry note all begin with correctly placing a company within one of these structures. This is exactly the kind of applied classification work built into an Investment Banking
Industry Life Cycle: How Industries Evolve Over Time
Beyond classifying what an industry is, analysts also assess where an industry sits in its life cycle — because growth rates, margins, and competitive intensity change predictably as an industry matures. The typical framework has five stages:
- Embryonic — A new industry just emerging (often around a new technology). Growth is slow initially since awareness and adoption are low, and few competitors exist. Risk is high; most companies fail.
- Growth — Demand accelerates sharply as the product gains mainstream acceptance. New entrants flood in, but existing players often grow fast enough that direct competition for market share is muted.
- Shakeout — Growth slows, competition intensifies, and weaker players are acquired or exit. Pricing pressure increases as firms compete for a shrinking pool of new customers.
- Mature — Growth stabilizes near the rate of overall economic growth. Market share becomes hard-won, consolidation is common, and companies compete more on efficiency and dividends than on growth.
- Decline — Demand shrinks, often due to substitution by newer technology or changing consumer preference. Overcapacity is common, and surviving firms typically compete on price or exit the industry.
For equity research, life-cycle stage matters directly: growth-stage companies are usually valued on revenue multiples and forward growth potential, while mature-stage companies are more often valued on earnings multiples, free cash flow, and dividend yield — using the wrong valuation lens for the wrong life-cycle stage is a common analyst mistake.
Cyclical, Defensive, and Growth Industries
Once an industry is classified, analysts further tag it by how sensitive its earnings are to the broader economic (business) cycle — a framework used directly in the CFA curriculum’s industry and company analysis material:
- Cyclical industries have earnings that rise and fall closely with the economy. They typically sell discretionary, often big-ticket items that consumers can delay buying in a downturn — automobiles, consumer discretionary goods, industrials, and basic materials are classic examples. These industries usually carry high operating leverage and above-market beta (consumer discretionary stocks, for instance, have historically run a beta of roughly 1.1–1.2 relative to the broader market).
- Defensive industries have earnings that stay relatively stable regardless of the economic cycle, because they sell necessities. Utilities, consumer staples (food, household products), and basic healthcare services are typical examples — demand doesn’t disappear in a recession because people still need electricity, groceries, and medicine.
- Growth industries sit outside the cyclical/defensive split entirely: demand is strong enough, independent of the business cycle, that these industries keep expanding through both good and bad economic periods. A well-known example is how certain technology companies kept growing revenue through the 2008–09 recession, when most industries were contracting sharply.
This classification directly informs sector rotation — portfolio managers systematically shift allocation toward cyclical and economically-sensitive sectors (Technology, Industrials, Consumer Discretionary) early in an economic expansion, and rotate toward defensive sectors (Consumer Staples, Utilities, Health Care) as the cycle matures or contracts.
Industry Structure: Competitive Intensity and Barriers to Entry
Two industries can look similar by revenue size or product type but behave completely differently as investments, depending on their underlying competitive structure. Analysts commonly assess this using four questions:
- How many players compete, and how concentrated is the market? An industry with a handful of dominant players (an oligopoly) typically has more pricing power and stable margins than a fragmented industry with dozens of similarly-sized competitors.
- How high are barriers to entry? High capital requirements, regulatory licensing, patents, or strong brand loyalty keep new entrants out and protect incumbents’ margins. Low barriers invite constant new competition and margin erosion.
- How much power do suppliers and buyers hold? If an industry depends on a small number of suppliers (or sells to a small number of large buyers), those suppliers or buyers can squeeze margins.
- How real is the threat of substitution? An industry selling a product with close substitutes (e.g., traditional taxis versus ride-hailing apps) faces constant pricing and demand pressure that a monopoly-like industry doesn’t.
A quick way to quantify market concentration is the Herfindahl-Hirschman Index (HHI) — the sum of squared market shares of all firms in an industry. A market with four equal firms at 25% share each has an HHI of 2,500 (0.25² × 4 × 10,000); regulators generally treat an HHI above 2,500 as “highly concentrated,” which is why this metric shows up in antitrust and merger review as much as in equity research.
Comparing Global Industry Classification Standards
If you’re working across markets, it helps to know that GICS and NSE/BSE aren’t the only classification systems in use — different standards dominate in different contexts:
| Standard | Maintained By | Primary Use |
|---|---|---|
| GICS | MSCI & S&P Dow Jones Indices | Global equity research, index construction and portfolio management |
| NSE/BSE Industry Classification | NSE Indices Ltd. | Indian equity markets and sectoral indices such as Nifty Bank and Nifty IT |
| NAICS | Governments of the United States, Canada and Mexico | Government economic statistics, business registration and tax-related classification |
| SIC | U.S. Government | Legacy U.S. regulatory and industry classification; still referenced in older SEC and historical datasets |
| ICB | FTSE Russell | Equity market classification used widely in the UK and Europe, with a structure broadly comparable to GICS |
The practical takeaway: if you’re building a comp set or reading a filing, check which classification system a company’s SIC/GICS/NIC code refers to before assuming it lines up with the same code in a different system — the numbering schemes are not interchangeable across standards.
These four sections turn the page from “here’s what an industry is” into something closer to a mini industry-analysis primer — which should also strengthen its relevance for anyone landing here via equity-research or CFA-adjacent search queries, not just generic “what is an industry” searches.
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A CFA charterholder with hands-on experience across investment analysis and finance education. At MentorMeCareers, he writes and reviews content on CFA, financial modeling, and investment banking careers — grounded in real market data rather than generic advice, and shaped by what actually helps candidates and professionals succeed.
