1.2.5 Commodities

Welcome to On Judgement. Oil prices rise, but an oil producer’s shares fall. Can both happen without an error? Name two business-specific reasons. Take a first view. You can change it when you have considered the evidence.

Energy includes fuels; industrial metals include materials used in production; precious metals have industrial and investment uses; agricultural commodities include crops and soft commodities. Quality, location, delivery date and storage can matter. A commodity is not a contractual promise to pay a coupon or dividend. Demand can respond to growth, technology, substitution and consumer behaviour. Supply can respond to capacity, weather, inventories, politics and transport. Responses take time. A demand increase shifts demand; it does not automatically shift the supply curve. The price effect depends on what changes relative to expectations.

A drought affecting a crop can restrict supply. A new technology can increase demand for a metal while reducing use of another. A refinery closure can reduce demand for crude oil while restricting the supply of refined fuel. A broad “oil up” rule misses the particular market and timing. Currencies, interest rates and inventories can also influence prices, but they do not dictate a fixed response. Markets may already anticipate a development. State what is held constant, which commodity and contract is affected, and what evidence would challenge the first interpretation.

Physical ownership involves storage, custody, insurance and operational arrangements. A futures contract sets terms for future delivery or settlement; it can be used for commercial hedging as well as speculation. Margin and contract rules matter. A short futures position has a different payoff from a long position. A commodity fund can hold physical assets, derivatives or other exposures, depending on its documents. Producer shares introduce company costs, financing, management and political risks. The wrapper does not reveal the economic exposure. Read what is held, how positions are maintained and what costs apply.

A futures-based exposure can differ from the spot price through changes in the contract price, rolling between maturities, collateral returns and fees. Contango describes higher prices for later maturities in the observed curve; backwardation describes the opposite. Neither is a simple forecast guaranteeing what the next price will be. Some commodity exposures can respond positively to some inflation shocks, but demand-led recessions, supply changes and currency effects can produce different outcomes. Gold can behave differently across periods. An intended diversifier must be assessed through the portfolio’s actual exposures and stress scenarios, not a universal “safe haven” slogan.

Let's work through A physical exposure and a simple futures payoff. One fictional physical unit is bought for £100 and sold for £110 after £4 storage/insurance costs. Separately, a long cash-settled teaching contract covers 100 units at £100; settlement is £110. Ignore interest and other costs. Pause here and try the calculation or reasoning before continuing.

Physical net gain: £110 − £100 − £4 = £6; return on purchase cost is 6%. Simple long contract payoff: 100 × (£110 − £100) = £1,000. A short contract on the same terms has the opposite £1,000 payoff before costs. Do not divide by margin posted and call it the unlevered asset return. Margin is collateral, not the full economic exposure.

The 10% spot-price increase differs from the physical net return and does not describe every futures strategy. Actual contract multipliers, settlement, financing and margin flows must be specified.

Now try the choices in this lesson. If your answer changes, identify the reason. Distinguish a commodity price change from the return on a particular investment exposure. Use the case activities to put the idea into your own words, and return to the evidence when more than one conclusion is defensible.