How do you use Porter's 5 forces to analyse a sector?

Porter's model identifies 5 forces that determine the competitive intensity of a sector: rivalry among existing competitors, threat of new entrants, bargaining power of customers, power of suppliers, and threat of substitute products. The more intense these forces, the lower the average sector profitability. A sector with high barriers to entry and few substitutes is structurally more profitable.

Sector analysis in the stock market: method and small-cap application 2026

Q: Why do sector analysis before investing?

Sector analysis helps you understand the context a company operates in: market growth, level of competition, economic cycles, regulation. A good company in a bad sector rarely outperforms. Sector analysis also defines the relevant valuation benchmarks (EV/EBITDA and P/E multiples vary widely from one sector to another).

Q: Which sectors are most represented on Euronext Growth?

The most represented sectors on Euronext Growth are: technology and software (25-30% of the universe), industrials and manufacturing (20-25%), healthcare and medtech (15-20%), professional services (10-15%), consumer and retail (10%), and energy/environment (5-10%). This composition differs from large-cap blue-chip indices, which are dominated by finance, energy and luxury goods.

Q: What are the average valuation multiples by sector?

EV/EBITDA multiples vary by sector: retail 5-8x, industrials 6-10x, services 8-12x, healthcare 10-15x, tech/software 12-20x+. These multiples reflect growth prospects and the stability of cash flows. A stock trading below the sector median may be an opportunity — or a stock-specific risk to analyse.

Q: Should you avoid certain sectors for small caps?

Some sectors are structurally unfavourable for small caps: very capex-heavy sectors (heavy energy, telecoms) where scale advantages penalise small players, heavily regulated sectors (banking, insurance) with costly regulatory barriers, and sectors in structural decline. Services, tech and healthcare are generally more favourable to small, agile companies.

Why sector analysis is essential

Two companies with identical financial profiles (same margin, same growth, same leverage) can be worth very different multiples depending on their sector. A software publisher with a 15% net margin deserves a P/E of 25x; a retailer with the same margin deserves 12x.

Sector analysis serves three concrete purposes:

Define the right benchmarks: compare a stock to its sector peers, not to the overall market.
Assess the quality of the competitive position: is the company in a structurally profitable sector?
Anticipate specific risks: cycles, regulation, technological disruption, dependence on raw materials.

Porter's 5 forces applied to small caps

Porter's model is the go-to tool for assessing the competitive intensity of a sector. The more intense the 5 forces, the lower sector profitability — and the harder it is for a small company to defend its margins.

Force 1

Competitive rivalry

Level of direct competition in the sector. Price wars, aggressive marketing, forced innovation.

Good sign: fragmented sector, specialised niches

Bad: commodities, aggressive oligopolies

Force 2

Threat of new entrants

How easily new players can enter the market and threaten established positions.

Good sign: high capex, regulation, strong brands

Bad: low barriers, open digital markets

CENTRE

Sector profitability

The result of the interaction of the 5 forces. Determines the structural profitability that is achievable.

Force 3

Customer power

Customers' ability to impose low prices or unfavourable terms.

Good sign: many fragmented customers, switching costs

Bad: concentrated customers, strong buying power

Force 4

Supplier power

Suppliers' ability to impose high prices or restrictive terms.

Good sign: many substitutable suppliers

Bad: single suppliers, critical components

Force 5

Substitute products

Risk that alternative products or services capture demand.

Good sign: unique needs, no viable alternative

Bad: many cheaper alternatives

Sectors represented on Euronext Growth

The Euronext Growth universe is dominated by growth sectors — tech, healthcare, services — unlike large-cap blue-chip indices, which lean towards finance and energy. Here are the reference valuation multiples:

Technology / Software

EV/EBITDA12 – 20x

P/E20 – 40x

High growth

Healthcare / Medtech

EV/EBITDA10 – 18x

P/E18 – 35x

High growth

Professional services

EV/EBITDA8 – 12x

P/E12 – 20x

Moderate growth

Industrials / Manufacturing

EV/EBITDA6 – 10x

P/E10 – 16x

Moderate growth

Retail / Consumer

EV/EBITDA5 – 8x

P/E8 – 14x

Low growth

Energy / Environment

EV/EBITDA7 – 12x

P/E12 – 22x

Energy transition

A 7-step sector-analysis checklist

Size and growth of the addressable market: is the total market growing, stable or declining? What is the company's market share?

Level of concentration: is the sector fragmented (an opportunity for small players) or dominated by a few giants (hard for small caps)?

Barriers to entry: patents, brand, network, regulation, capex? The higher the barriers, the more defensible the positions.

Cyclicality: is the sector tied to the economic cycle (industrials, construction) or recurring/defensive (healthcare, SaaS software)?

Regulation: is the regulatory environment stabilising (a barrier for entrants) or a potential disruptor (risk of rule changes)?

Sector valuation benchmarks: what is the median EV/EBITDA multiple of the comparables? Does the stock trade at a discount or a premium?

Competitive position within the sector: leader, challenger or follower? What is the market-share trend over 3-5 years?

Sector and competitive position in the screener score

Screener Small Caps classifies every Euronext Growth stock by sector and compares its fundamentals with peers. Sector analysis is built into the ML score.

Open the screener →

Frequently asked questions

Why do sector analysis before investing?▾

To put the company's fundamentals in context: define the right benchmarks, assess competitive quality and anticipate sector-specific risks. A solid company in a declining sector will rarely outperform.

Which sectors are most represented on Euronext Growth?▾

Technology/software (25-30%), industrials (20-25%), healthcare/medtech (15-20%), professional services (10-15%), consumer (10%), energy/environment (5-10%). A different profile from large-cap blue-chip indices dominated by finance and energy.

How do you use Porter's 5 forces?▾

The 5 forces (rivalry, new entrants, customers, suppliers, substitutes) define competitive intensity. The more intense they are, the lower sector profitability. A sector with strong barriers to entry is structurally more profitable.

What are the average valuation multiples by sector?▾

EV/EBITDA: retail 5-8x, industrials 6-10x, services 8-12x, healthcare 10-18x, tech/software 12-20x+. These multiples reflect growth prospects and the stability of cash flows.

Should you avoid certain sectors for small caps?▾

Yes. Sectors to avoid for small caps: high capital intensity (heavy energy, telecoms), heavy and costly regulation (banking, insurance), structural decline. Tech, healthcare and services are better suited to small, agile companies.