Commodities Trading Basics

Commodities are the raw inputs to every other market. The equity trader who ignores them is missing a layer of information that the professionals take for granted. The trader who understands them gains a cross-asset read that sharpens positioning in every other market they touch.

This article covers how commodity markets work, what drives prices in each major category, and how you can access these markets as a trader or use commodity price action as a lens on broader macro conditions.

The Main Categories

Commodity markets are broadly divided into three families.

Energy covers crude oil, natural gas, gasoline, heating oil, and refined products. Crude oil is the most traded physical commodity in the world. West Texas Intermediate (WTI) is the US benchmark; Brent Crude is the global benchmark used for most international pricing. Natural gas is a separate market with different supply dynamics, a different seasonal pattern, and very different price behaviour — it is far more volatile relative to its price per unit and is driven heavily by weather-driven demand spikes.

Metals splits into precious and industrial. Gold in particular is treated as a monetary asset by central banks and institutional investors. Its price responds to real interest rates, dollar strength, geopolitical risk, and systemic financial stress. Silver has both monetary and industrial components. Industrial metals — copper, aluminium, zinc, nickel — are driven primarily by manufacturing and construction demand. Copper's correlation with global economic activity has earned it the informal title of market economist.

Agriculture includes the soft commodities — wheat, corn, soybeans, sugar, coffee, cotton — as well as livestock markets. Agricultural prices are driven by production fundamentals: planting area, growing conditions, yield expectations, storage levels, and export demand. These markets are heavily seasonal, weather-sensitive, and subject to sudden large dislocations when a drought or flood disrupts a major growing region.

How Commodity Prices Are Determined

At the most fundamental level, commodity prices are set by supply and demand. But that principle covers a lot of complexity underneath it.

On the supply side, you have physical production capacity, inventory levels, and the cost of extraction or cultivation. Supply responses in commodities often lag price signals significantly. It takes time to drill a new well, build a refinery, or plant and harvest a new crop. These lags create the conditions for sustained price moves in both directions.

On the demand side, industrial and economic activity drives consumption. Global GDP growth is the dominant long-run driver of energy and industrial metal demand. Specific sector trends matter too — the electric vehicle buildout has fundamentally changed the demand outlook for copper, lithium, and nickel.

Storage levels are a critical intermediate variable. When inventories are high, the market has a cushion against supply disruptions and demand spikes. When inventories are low, the market is fragile — a modest supply disruption can cause a sharp price spike because there is no buffer to absorb it. Traders watch inventory data releases closely: US crude oil inventories (EIA weekly report), global copper warehouse stocks, and agricultural supply-use tables from the USDA are among the most market-moving regular data releases in commodity markets.

Seasonal Patterns in Commodity Markets

Unlike equities, many commodities have genuine seasonal patterns driven by physical supply and demand cycles. These are not technical patterns — they are the consequence of how the natural world works.

Natural gas prices tend to rise heading into winter as heating demand increases in the northern hemisphere, and often soften through spring. Traders watch temperature forecasts as closely as supply data when positioning in natural gas.

Agricultural commodities follow planting and harvest cycles. Grain markets often see price pressure in the northern hemisphere harvest months (August to November) as new crop supply arrives. They can rally ahead of and during the planting season if weather uncertainty is elevated.

Crude oil has a less pronounced seasonal pattern, but refined products do. Gasoline demand rises in summer in the US driving season, which tends to tighten refinery margins and can pull crude prices with it. Heating oil demand peaks in winter.

Geopolitics and Commodity Pricing

No other asset class is as directly exposed to geopolitical events as commodities. This is because the physical supply of commodities is concentrated in specific geographies, and those geographies are frequently politically complex.

A significant share of the world's oil reserves sits in the Middle East. Conflict or diplomatic disruption in that region immediately raises questions about supply reliability and creates a risk premium in crude prices. The same logic applies to Russian natural gas supply to Europe, to Ukrainian wheat exports, to Chilean copper production, and to South African platinum supply.

The critical concept: the geopolitical risk premium. When a supply disruption risk materialises, the commodity price embeds an extra premium above pure fundamentals. When the risk dissipates, that premium comes out of the price rapidly. This means commodity prices can move substantially on news that has no physical supply impact yet, and can fall sharply when risk fears recede even if nothing in the actual supply picture has changed.

For traders, geopolitical events in commodity-rich regions are worth tracking not just for the commodity in question but for the second-order effects on equities, currencies (resource-currency pairs like AUD/USD and USD/CAD are closely tied to commodity prices), and overall risk sentiment.

How to Access Commodity Markets

There are several routes into commodity market exposure, each with different characteristics.

• Futures contracts are the primary market and offer direct exposure to physical commodity prices. Highly liquid, capital-efficient, and available in standard and micro sizes. The CME Group lists futures on crude oil, natural gas, gold, silver, copper, corn, wheat, soybeans, and many others. Futures are the professional's tool and the most direct expression of a commodity view.
• ETFs and ETPs allow commodity exposure through a conventional brokerage account without requiring a futures account. Commodity ETFs come in several forms: those that hold physical commodity, those that roll futures contracts (which introduces roll costs that can erode returns significantly in contango markets), and those that hold equity in commodity-producing companies.
• CFDs offer leveraged exposure to commodity prices through retail brokers. The mechanics are simple and account sizes are smaller, but the costs of carry and financing can be significant for positions held more than a few days.
• Commodity equities — oil majors, mining companies, agricultural businesses — offer indirect commodity exposure with additional company-specific risk. In a rising gold price environment, miners often amplify the gold move due to operating leverage. In a falling environment, they can fall faster than the commodity itself.

The Dollar's Role in Commodity Pricing

Most commodities are priced globally in US dollars. This creates a mechanical relationship between the dollar and commodity prices that operates regardless of supply and demand fundamentals: when the dollar strengthens, dollar-priced commodity prices tend to fall. When the dollar weakens, the same commodity costs more dollars, pushing prices higher.

This inverse relationship is consistent enough to be useful as a first-pass check when you see commodities moving in an unexpected direction. If crude oil is falling but there has been no supply news, a significant dollar rally is often the explanation.

For forex traders, commodity prices are a direct input into the analysis of several major currency pairs. The Australian dollar has a strong historical correlation with iron ore, copper, and coal prices because Australia is a major exporter of all three. The Canadian dollar tracks crude oil closely. The New Zealand dollar responds to dairy and agricultural commodity prices.

OPEC, Cartels, and Supply Management

Oil markets operate differently from most other commodity markets because of OPEC and its extended alliance OPEC+. This group of producing nations collectively manages their output levels with the explicit intention of influencing the global oil price. When they agree to cut production, supply falls and prices rise, all else being equal. When they increase output targets or disagree internally, more supply hits the market and prices come under pressure.

OPEC+ meetings are scheduled events that commodity traders watch closely. A deeper-than-expected cut is bullish for oil. A surprise announcement to raise production is bearish. A breakdown in unity — where a member country publicly refuses to comply with agreed cuts — is particularly negative because it signals that the cartel's control over supply is weakening.

No other commodity market has an equivalent organised supply management body with the same scale and influence. Agricultural markets have no OPEC. Gold has no cartel. This makes oil fundamentally different in that the supply side is partly administered rather than purely market-driven.

Using Commodities as a Cross-Asset Lens

Even if you trade primarily equities or forex, commodity price action carries information that improves your reads on other markets.

• Rising crude oil tends to weigh on airline stocks, logistics companies, and consumer discretionary sectors while benefiting energy producers. Persistent oil price increases are also inflationary, which affects bond markets and central bank expectations.
• Copper weakness is often an early warning that global growth expectations are being revised down. When copper leads equities lower, the question worth asking is whether equity markets have priced the growth slowdown yet.
• Gold strength relative to equities often signals rising uncertainty or real rate compression. When gold and equities are both rising, the gold move is telling you something about currency expectations rather than pure fear.
• Agricultural commodity spikes feed into food inflation data and have particular weight in emerging market economies where food is a larger share of the consumer basket. These moves can drive central bank decisions in countries where they might otherwise be secondary factors.