Why does the industry always seem to build too much, too late?

Take long lead times, add the fact that every producer sees the same price at the same time, and you get the capex cycle — the boom-bust rhythm that organises decades of commodity history. It is not incompetence. It is what rational firms produce when they must decide together, in the dark, using a price that will have changed by the time they finish.

The loop, in six steps

1. Shortage. Prices spike; producers' cash flow explodes.
2. Capital commitment. Boards approve expansions — at the top, on top-of-cycle price assumptions, with cash they only have because the price is high.
3. The gap. For years nothing arrives. Prices stay high; more projects are approved into the same window.
4. Arrival. Capacity lands, and because everyone read the same signal, it lands together — into demand that has meanwhile adapted downward.
5. Glut. Prices fall below cost. Capital spending is slashed; exploration budgets are the first casualty; management is punished for the last cycle's ambition.
6. Underinvestment. Years of thin capex quietly set up the next shortage. Return to step 1.

The reinforcing detail is that capex is funded by cash flow, which is highest exactly when prices are highest. The industry is structurally financed to invest at the top and starve at the bottom.

A worked example

Eight producers each hold 12.5% of a market. Each independently decides that a 5% expansion of its own output is prudent — a modest, defensible move.

• Each adds 5% of its own 12.5% = 0.625% of global supply.
• Eight of them = 5% of global supply, all arriving within roughly two years.
• Demand over that window grew 2% a year, so ~4%.
• Net: about a 1% surplus — which, at a short-run demand elasticity of −0.05, is worth roughly a 20% fall in price.

Nobody over-built. Every single board was conservative. The aggregate was still a glut. Each could read the others' announcements — capex and project pipelines are reported — but none could bind the others, and every board had to commit years before knowing which rival projects would actually finish, when, and at what cost. That is a coordination failure, and it is structural to any industry with long lead times and a common price signal.

What you can and cannot do with this

You can observe the cycle's inputs. Industry-wide capital spending, exploration budgets, rig and project counts, and the age profile of existing capacity are all reported. Years of falling capex are a fact about the future supply pipeline, not an opinion.

You cannot time the turn. The lags are long, variable and different in every cycle; demand can weaken exactly when the supply pipeline runs dry, cancelling the effect entirely. Analysts have called the "next supercycle" many times more often than one has occurred.

This is also where commodities meet equities: producers' profits are a leveraged function of the price, so the capex cycle drives an earnings cycle in the mining and energy sectors — the mechanism behind the cyclical-sector lessons in Fundamental Analysis.

In the data

A producer's capital spending is published in its cash-flow statement, once a year, and weeks after the year it describes. One large copper producer's newest year is below.

Freeport-McMoRan's year ended on 31 December 2025 and its spending for that year was not published until 13 February 2026. Line capex up against the commodity price by the year it describes and you have quietly handed yourself six weeks of information nobody had at the time; line it up by the day it was published.

Try it now

1. Below are Exxon Mobil's newest cash-flow year and then eight years of capital spending for two of the largest oil producers, Exxon Mobil and Chevron. Does spending rise and fall with the commodity price, or lead it?

2. Line that capex series up against the commodity's own price history — continuous crude, below; switch it to Monthly and find the same eight years. Mark the year each company's spending bottomed and the year crude did. The lag between the two is the cycle you just read about.

3. Write the honest limit in one line: underinvestment is an observable fact about the pipeline, never a forecast of the price.