Porter's Five Forces

Some industries are structurally hard to make money in, and no amount of good management fixes that. Five Forces is the tool for spotting it before you buy the share.

The framework asks a single question — where does the profit end up? — and names the five parties who can take it: existing rivals, companies that might enter, products that meet the same need differently, suppliers, and customers.

Porter set the forces out as three horizontal and two vertical. The horizontal ones are the threat of substitutes, the threat of new entrants and rivalry among established competitors. The vertical ones are the bargaining power of suppliers and of buyers.

The more forces that are strong, the more of the industry's profit is competed or negotiated away. Airlines are the standard illustration: rivalry over an undifferentiated seat, two suppliers of aircraft and a fuel bill set by crude, customers who compare prices in ten seconds at no switching cost, and low entry barriers whenever capital is cheap. Five strong forces, and an industry that has grown passengers at double digits for decades while destroying capital.

Two Indian industries, the same decade, both growing.

Decorative paints. The top four hold roughly two-thirds of the market. The real barrier is distribution — a network of tens of thousands of dealers with tinting machines, built over twenty years and impossible to rent. Buyers are individual households with no bargaining power at all. Suppliers sell commodity inputs like titanium dioxide, available from many sources. Substitutes are weak. Four weak forces out of five → EBITDA margins in the high teens and ROCE above 25%.

Airlines. Buyers sort by price on an aggregator. Aviation turbine fuel runs around 40% of operating cost and is priced by the market. Aircraft come from two manufacturers, and airport slots from a monopolist. Rivalry is on price because the product is a seat. Five strong forces → an industry ROCE that is negative across the cycle.

Both grew. Only one let its participants keep the money.

Chapter 6 (Industry Analysis) uses Five Forces as the main framework for judging industry attractiveness, alongside PESTLE and SWOT. Expect questions naming the five forces, scenario questions asking which force a described pressure represents, and the link between strong forces and weak industry profitability.

• There are five, and government is not one of them. Regulation is often discussed as a sixth force elsewhere; for the exam the list is fixed at five.
• It analyses the industry, not the company. A well-run firm in a terrible industry still faces all five forces — which is the point of running the analysis first.
• "Threat of new entrants" means potential entrants, not the rivals already competing. Those are a separate force.
• A substitute meets the same need a different way — a video conference instead of a flight. A rival's product is not a substitute.
• Rapid growth does not make an industry attractive. Growth attracts entrants, which is itself one of the forces.