Commodities Explained / Commodity Foundations

Organise the commodity universe without assuming that everything within one family has the same economics.

The main commodity families

Metals include precious metals such as gold and silver and industrial metals such as copper and aluminium. Energy includes crude oil, natural gas and refined fuels. Agricultural markets include grains and oilseeds, while the trading label softs commonly covers coffee, cocoa, sugar and cotton.

These are useful organising labels, not perfect scientific boundaries. Soybeans are oilseeds even when a trading platform places them beside grains. Silver has both investment and industrial uses. Always examine the particular material rather than relying on the category name.

What a benchmark represents

A benchmark is a reference used to describe or price a defined market. It may represent a specified physical grade at a location, or an exchange contract with a delivery month. A quote does not promise that every buyer can obtain every grade at that price.

Oil provides a useful example. WTI and Brent refer to different benchmark systems. A refinery’s actual purchase cost can include quality adjustments, freight and contractual premiums or discounts. Calling both prices oil hides those differences.

Benchmarks and investable indices differ

A commodity index combines exposures using published rules. Its weights may depend on production, liquidity or another methodology. Its return calculation may include only futures price changes or also collateral returns. Two indices with similar names can therefore behave differently.

Before comparing an index with a fund, identify which version the fund follows and how fees are applied. Do not compare a return series with a spot price level and assume the difference is an error.

Build your market directory

For each commodity, record its family, main uses, benchmark name, quotation unit, location and relevant contract month. Then identify an original source for the specification. The directory should contain definitions before forecasts.

Use it to check headlines. An article about natural gas at a European delivery point may say little about the price received by a producer in another region. Similar names do not make separate physical systems identical.

Put it into practice

A report says oil rose, while your energy fund fell. Name three facts you need before deciding that something is wrong.

Check your answer

Identify the oil benchmark and measurement period, the assets or contracts held by the fund, and its return calculation including fees and currency. An energy equity fund is not a barrel of oil.

Sources and further reading

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