Commodities
What It Is
Commodities are physical goods that are broadly interchangeable across producers. They include energy (crude oil, natural gas, coal), metals (gold, silver, copper, aluminium), agricultural products (wheat, corn, coffee, cotton), and livestock. As an alternative investment category, “commodities” covers several distinct types of exposure:
Physical ownership — Buying and storing the commodity itself. Practical for precious metals (gold can be held in a vault); impractical for most others due to storage, logistics, and perishability.
Futures and derivatives — Standardised contracts to buy or sell a commodity at a set price on a future date. The dominant form of institutional commodity investment. Most large commodity indices (e.g., Bloomberg Commodity Index, S&P GSCI) are futures-based.
Commodity equities — Shares in mining, energy, or agricultural companies. Provides indirect exposure with equity risk layered on top; the company’s leverage, management quality, and costs affect returns independently of commodity prices.
Commodity-linked infrastructure — Physical assets whose revenues are tied to commodity production or transport: pipelines, storage terminals, power generation, port facilities. These sit at the intersection of commodities and infrastructure, often with contracted revenues that reduce spot price sensitivity. See Infrastructure.
The choice of vehicle has significant implications for liquidity, cost, operational complexity, and the nature of the return generated.
Key Return Drivers
Commodity returns are driven by fundamentals quite different from those of financial assets:
Supply and demand — Commodity prices reflect the physical balance between production and consumption. Supply disruptions (weather, conflict, regulatory change, underinvestment in new production) and demand shifts (industrialisation, energy transition, seasonal patterns) drive price movements.
Storage and convenience yield — Physical commodities must be stored, and storage has costs. The relationship between spot and futures prices reflects both storage costs and the “convenience yield” — the benefit of holding physical inventory when supply is tight. When spot prices exceed futures prices (backwardation), holders of physical commodity earn a positive return from rolling contracts. When futures prices exceed spot (contango), rolling contracts costs money.
Roll yield — For futures-based exposure, rolling from expiring contracts to the next contract generates positive or negative roll yield depending on the futures curve shape. Contango markets (futures above spot, typical when storage is costly and supply is ample) produce negative roll yield, which can erode returns significantly over time.
Inflation sensitivity — Commodity prices are often denominated in nominal terms and historically have shown positive correlation with inflation, particularly supply-driven inflation. This makes commodities a potential portfolio hedge against unexpected inflation.
Geopolitical risk — Many key commodities are concentrated in a small number of producing regions. Geopolitical events — sanctions, conflicts, export restrictions — can create sharp, sudden supply disruptions with no immediate substitution possible.
Key Risks
Price volatility — Commodity prices can be highly volatile. Energy prices in particular can move 30—50% or more within a year in response to supply or demand shocks. See Volatility.
Roll yield risk — Contango markets erode futures-based returns even when spot prices are flat or rising. Understanding the futures curve is essential for evaluating commodity fund performance.
Concentration risk — Commodity portfolios can become highly concentrated by sector (energy, metals) or by geography (specific producing regions). Sector concentration amplifies price-shock exposure. See Concentration Risk.
Currency risk — Most global commodities are priced in US dollars. Non-USD investors have currency exposure on top of commodity price exposure. See Currency Risk.
Storage and logistics — Physical commodity exposure involves real operational obligations: vault or warehouse costs, insurance, transport, and quality management. Futures-based exposure avoids these but introduces basis risk (the difference between the index or contract price and the actual price of the commodity at a specific location).
Regulatory risk — Commodity markets are subject to position limits, reporting obligations, and changing regulation. See Regulatory Risk.
Operational Considerations
Margin and collateral — Futures contracts require initial margin (collateral posted when opening a position) and variation margin (daily settlement of gains and losses). Operations teams must actively manage cash flows to meet margin calls; failure to post margin results in position liquidation. Collateral is typically held in short-dated government bills.
Valuation — Futures-based commodity exposure is marked at daily settlement prices from the relevant exchange. Physical commodity holdings require independent third-party valuation, typically from specialist commodity assayers or vault receipts.
Reporting — Investor reporting covers commodity sector allocations, futures curve positioning, roll strategy, and collateral deployment. Reporting differs significantly from equity or credit fund reporting and requires specialist systems.
Custody and storage — For physical precious metals, custodial arrangements use specialist vault providers (not standard prime brokers or depositary banks). Insurance, segregation, and audit of holdings are important operational controls.
Key Metrics
| Metric | Meaning |
|---|---|
| Spot return | Return from price movement of the underlying commodity |
| Roll yield | Return (positive or negative) from rolling expiring futures to the next contract |
| Collateral yield | Return from the cash or bills held as margin against futures positions |
| Total return | Spot return + roll yield + collateral yield |
| Volatility | Standard deviation of commodity price or fund returns |
Related Files
Manual Review Notes
- This file covers commodities as an alternative investment allocation at a conceptual level. Trading strategies (trend-following, spread trading, options) and detailed derivatives mechanics are outside its scope.
- Commodity index composition and methodology vary significantly. The Bloomberg Commodity Index and S&P GSCI have different sector weights and rebalancing rules. Investors should not assume commodity indices are interchangeable.
- Commodity-linked infrastructure (pipelines, storage) has different risk and return characteristics from spot or futures-based commodity exposure. The link to Infrastructure is the appropriate source for deeper treatment of that category.