Commodity cycles and the cost of new supply

Commodities Explained / Supply and Price Drivers

Learn why supply responses take time and why production costs are useful context rather than a guaranteed price floor.

Why supply can be slow to respond

Higher prices can encourage additional production, but capacity cannot always appear immediately. A mine may need permits, construction and infrastructure. A farmer must work within a planting and harvest cycle. Existing equipment may also have operating limits.

Demand can be slow to change too. A factory cannot always redesign its products or substitute materials quickly. These delays help explain why modest changes in availability can coincide with large price movements.

Separate the cost measures

An existing operation compares revenue with the costs relevant to continuing production. Building a new project requires a broader calculation that includes construction, financing and an acceptable return over time. A price that keeps an old mine running may not justify a new one.

Company cost measures can exclude different expenses or include credits from other products. Compare definitions before placing producers on a single cost curve.

An illustrative cycle

Suppose several producers approve new projects after a period of strong prices. Construction takes years. If demand grows more slowly than expected by the time those projects open, the added output can pressure the market. The original investment decision may have been reasonable under assumptions that later changed.

The reverse can occur after a long period of restrained spending. Spare capacity may be limited when demand strengthens. This is a scenario framework, not a timetable that every commodity follows.

Costs are not a guaranteed floor

Prices can temporarily fall below the costs of some producers. Firms may continue operating because stopping and restarting is expensive, contracts require delivery, or other products contribute revenue. Costs also change with wages, energy, exchange rates and ore quality.

For research, separate announced capacity from projects funded, built and producing saleable output. Then test several demand paths. A spreadsheet that assumes every announced project arrives on time creates false precision.

Put it into practice

A producer reports an operating cost of $40 per unit. Does that mean a new project is attractive whenever the commodity trades at $41?

Check your answer

No. The project must also cover relevant construction, financing, sustaining investment and other costs over its life. The reported operating measure may omit important expenses.