# Understanding Commodities

Source page: https://www.materialinsights.org/learn/commodities/

The ideas behind every tile

## Understanding Commodities

Eight modules, each a chapter in its own right, take you from what makes something a commodity to how it is mined or grown, priced, traded, shipped and fought over. Every module is split into parts and sections, with worked examples, cases from the books in your library, checks at the end of each part and a final quiz. Work through them in order or go straight to what you need.

## Modules

1. [What makes something a commodity](https://www.materialinsights.org/learn/commodities/what-is-a-commodity/): You will understand what turns a raw material into a commodity: a standard specification, interchangeable units and a price discovered in the open, and why the definition frays for minor metals, quality coffee and diamonds. You will see how the table's fifteen families share economics of storage, supply lags, by-product status and value density, why commodities matter so much to the world economy and to exporters that depend on them, and how to read every number on a tile.
2. [From ground to market](https://www.materialinsights.org/learn/commodities/from-ground-to-market/): You will follow minerals, hydrocarbons and crops from the rock or the field to a traded product, and see how deposit type, ore grade, processing chemistry and the seasons set costs and supply lags. You will also learn how smelters and refiners earn their margins, why so much processing sits in China, and why a mine now needs the consent of its neighbours as well as a permit.
3. [Supply, demand and the cost curve](https://www.materialinsights.org/learn/commodities/supply-demand-costs/): Commodity prices come from a steep, cyclical demand curve meeting a supply curve that is flat while there is spare capacity and a wall once there is not. You will see how demand follows development and technology, how the industry cost curve sets price floors and rents, why lead times, by-products and harvests make supply slow to respond, and when cartels and governments can bend the outcome.
4. [Reserves, stocks and depletion](https://www.materialinsights.org/learn/commodities/reserves-stocks-depletion/): Reserves are an inventory set by prices, technology and the cost of drilling, which is why reserve life rarely falls and why depletion is best judged by cost rather than by tonnes left. You will also see how the large stock of materials in use limits what recycling can do while it grows, and how inventories of metal, oil and grain set prices and turn modest shocks into spikes.
5. [Prices and cycles](https://www.materialinsights.org/learn/commodities/prices-and-cycles/): You will understand how commodity prices are actually set, from exchange rings to benchmark talks and price assessments, and why they swing so violently. You will learn to read the forward curve through the theory of storage, to judge long-run trends in real prices, and to tell a business cycle from a boom or a claimed super-cycle, using cases from the 1973 oil shock to the 2022 fertiliser shock.
6. [How commodities trade](https://www.materialinsights.org/learn/commodities/how-commodities-trade/): Commodities change hands under contracts ranging from a single spot cargo to standardised futures backed by a clearing house. You will see how margins, delivery and storage tie exchange prices to physical goods, how hedgers swap price risk for basis risk, and how squeezes exploit the delivery promise. You will also see how trading houses earn money by transforming commodities in space, time and form, and why their financing and power make them controversial.
7. [How commodities move](https://www.materialinsights.org/learn/commodities/how-commodities-move/): Why some commodities are traded across the world while others stay home, how freight, ships, pipelines and chokepoints shape the routes, and how to read trade statistics without being misled by codes, valuation, hubs and missing reporters. It ends with the policies that redirect flows: tariffs and escalation, export bans, sanctions, and the resource nationalism of producing countries.
8. [Criticality and geopolitics](https://www.materialinsights.org/learn/commodities/criticality-and-geopolitics/): Critical materials are those whose supply could be cut and whose loss would hurt, which is a different question from scarcity. You will see how the EU, US and Indian lists and Graedel's three axes are built, how concentration and by-product status drive supply risk, how oil in 1973, rare earths in 2010 and China's controls since 2023 turned concentration into leverage, and how the same logic applies to battery metals, fertiliser and food.