Industry life cycle

Industries are not static. They are born, they grow up, they mature, and eventually most of them fade. Analysts use this pattern to judge where an industry stands right now.

The workbook sets out four stages in this life cycle. Introduction is the earliest, with modest sales and little or no profit. Growth follows, once a real market for the industry's products develops. Maturity is usually the longest phase, where growth roughly tracks the wider economy. Decline comes last, as demand shifts away and some firms even turn unprofitable.

Knowing which stage an industry is in shapes how an analyst reads every company inside it.

The 4 stages, in order: in Introduction, firms face small markets and high development costs, and profits are minimal or negative. In Growth, fewer competitors and rising demand push profit margins high, though the rapid growth itself eventually attracts new entrants, and margins begin drifting back toward normal as the industry matures. In Maturity, competition is high, firms differ mainly in cost structure and cost control, and margins settle at normal levels for an extended period, usually the longest of the 4 stages. In Decline, sales fall as demand shifts elsewhere, margins come under pressure, and some firms may report outright losses.

This life-cycle read is one input into company analysis, the final stage of the top-down approach to stock analysis, alongside macroeconomic and industry analysis.

Illustrative. An electric-vehicle charging equipment maker in India shows the classic Introduction signs: it posted a loss of Rs 12 crore last year, on sales of just Rs 30 crore, as it builds out its network — small relative to the wider auto-components industry.

Compare this to India's private-sector banking industry, widely seen as Maturity: growth of roughly 7-8% broadly tracks GDP growth, competition among more than a dozen well-established banks is intense, and margins differ across banks mainly because of how well each controls its own costs, not because any one bank has an easy, uncontested market.

Chapter 8 (Investing in Stocks), section 8.5.2 (Industry/Sector Analysis), sets out the four life-cycle stages with Figure 8.2, immediately before the chapter moves to company analysis. Expect a question naming the number of stages, or one asking a candidate to place a described industry into the correct stage from its growth and margin pattern.

• There are four stages, in this fixed order — introduction, growth, maturity, decline — not three or five, and not interchangeable.
• Maturity is generally the longest phase, not growth, which is a common wrong assumption.
• Being in the growth stage does not guarantee high margins forever — the workbook is explicit that rapid growth itself attracts competitors, pulling margins back toward normal as the industry moves into maturity.