Commodities - The Production Asset Class

By EC Assets Research Team, Real Assets Research · Published 19 May 2026 · Updated 15 June 2026

Commodities — Commodities are physical raw materials traded as fungible goods on regulated exchanges. Returns derive from production economics, storage costs, and roll yield, not from corporate cash flows.

Definition

Commodities are physical raw materials traded as fungible, standardised goods on regulated exchanges. The category divides into four primary families: energy (crude oil, natural gas, refined products), metals (precious metals like gold and silver, industrial metals like copper and aluminium), agriculture (grains, livestock, soft commodities like coffee and cotton), and increasingly emissions allowances and water rights.

What distinguishes commodities from other asset classes is the source of return. Equities pay dividends from corporate earnings; bonds pay coupons from credit risk; real estate pays rent from tenants. Commodities have no cash flows. Returns instead derive from three mechanical sources: changes in the spot price (the physical price of the underlying material), roll yield (the structural relationship between near and far-dated futures contracts), and the collateral interest earned on the cash that backs the futures position.

This structural difference matters operationally. A commodity allocation is not a claim on productive assets that compound over time. It is a position in a market where supply and demand for a finite, physical resource set the price. Long-run real returns from commodities have averaged near zero in inflation-adjusted terms over centuries; the institutional case rests on shorter-horizon hedging and diversification properties, not on long-run compounding.

The Commodity Universe

A practical taxonomy used by allocators groups commodities into four families with distinct supply-demand dynamics:

Within each family, the dispersion between commodities is large. Crude oil and natural gas often move in opposite directions when storage constraints bind. Gold and copper have low correlation despite both being metals because their demand drivers differ fundamentally. Diversified commodity indices smooth these idiosyncrasies but lose the differentiated exposure that active commodity allocation can capture.

How Commodity Returns are Generated

A long commodity position held through futures generates returns from three mechanically distinct sources:

Spot price change. If physical crude rises from $80 to $90, the underlying contract value rises by 12.5%. This is the source most participants intuit, but it is typically the smallest contributor to long-run returns for diversified commodity indices.

Roll yield. Futures contracts expire. To maintain exposure, the holder sells the expiring contract and buys the next contract. If the next contract trades higher (contango), the roll loses money. If it trades lower (backwardation), the roll makes money. Over years, this roll yield can dominate spot price changes for the total return of long futures positions.

Collateral yield. Futures require only a fraction of contract value as margin. The remaining cash sits in T-bills earning interest. In high-rate environments, this collateral yield is meaningful (3-5% annually); in zero-rate environments, it disappears.

[!key] Roll yield is the most under-appreciated driver of long-run commodity returns. A passive long position in crude oil futures lost roughly 35% from 2009 through 2016 despite spot crude prices being roughly flat across the period, purely from rolling through persistent contango. The same period saw backwardated commodities like aluminium produce small positive returns from rolling alone.

Contango, Backwardation, and the Roll Trap

The shape of the futures curve determines whether long passive positions structurally gain or lose money:

Which shape prevails depends on the storage economics of the specific commodity. Storable commodities (crude oil, copper, gold) tend toward contango because the cost of storage and financing adds to the price of future delivery. Non-storable or perishable commodities (natural gas at certain locations, livestock at specific delivery points) often show backwardation because there is no arbitrage that links current and future prices through storage.

Sophisticated commodity strategies actively choose which contracts and roll dates to use. Enhanced indices avoid the most contangoed contracts and prefer those near the back of the curve. Active CTAs trade roll yield as an explicit alpha source.

Institutional Implementation

The institutional case for commodities rests on three properties that are weaker than the popular narrative suggests but real over the right horizons:

Inflation hedging. Commodities, particularly energy and industrial metals, have a meaningful contemporaneous correlation to inflation surprises. During supply-driven inflation episodes (1970s oil shocks, 2021-2022 energy crisis), diversified commodity baskets delivered 15-25% annual returns while equities and bonds suffered. The hedge weakens substantially during demand-driven inflation when commodity prices and equities rise together.

Equity diversification. Long-run correlations between commodities and the S&P 500 average around 0.3, similar to high-yield credit but lower than REITs or private equity. The diversification benefit shows up most strongly during stagflation regimes and certain geopolitical events.

Tail-risk diversification. Specific commodity strategies (long gold, long energy during Middle East tension, long agricultural commodities during weather extremes) can produce meaningful positive returns during equity drawdowns. These are not consistent properties of the asset class as a whole; they are specific strategy choices within it.

Common Misconceptions

"Commodities always hedge inflation." Only against supply-side inflation. Demand-driven inflation often sees commodities rise alongside equities, providing little diversification benefit when most needed.

"Long-only commodity exposure is the cleanest way to allocate." Long-only passive exposure carries structural roll-yield drag that compounds to material underperformance over years. Active or enhanced strategies have historically outperformed passive long-only baskets by 200-400 basis points per year net of fees.

"Gold is a special commodity that always hedges." Gold's hedge properties are real but conditional. It hedges monetary debasement, geopolitical stress, and severe equity drawdowns. It underperforms during periods of rising real interest rates and during demand-driven inflation. Treating gold as an unconditional hedge ignores when it fails.

References

1. Geman, H. (2005). Commodities and Commodity Derivatives. Wiley.
2. Fabozzi, F. J., Fuss, R., & Kaiser, D. G. (2008). The Handbook of Commodity Investing. Wiley.