Picture a pension fund that fills a warehouse with copper to bet on rising prices. Along with the price exposure, it now has a physical storage problem. Institutions usually get commodity exposure through derivatives instead of physical inventories, for three reasons:
- Storage and inventory-management costs. Physical commodities have to be stored, moved, insured, and managed. Most institutions don't have that expertise and don't want to pay those costs of ownership.
- Wasted convenience yield. Convenience yield is the marginal benefit of holding the physical commodity instead of owning it synthetically through futures.
- Financing or opportunity cost. Buying inventory either ties up capital that could earn a return elsewhere or requires borrowing at a direct financing cost.
Some firms make money from storage itself. Natural gas storage operators take in gas during low-demand summers and deliver it in high-demand winters. They earn storage fees and profits, not general price exposure. Physical ownership makes sense mainly for participants who store more cheaply than others or who get a high convenience yield.
Common mistakes
- Treating commodity producers as pure commodity exposure. Gold rose roughly sixfold from 2002 to 2012; gold miners rose only roughly threefold. Oil ETFs XES and XOP correlated 0.65 and 0.51 with USO but 0.62 and 0.60 with SPY. Producer equities carry equity-market beta in addition to commodity sensitivity.
- Forgetting the three correlation drivers. Demand elasticity, supply elasticity, and the firm's hedging policy each shape how much of a commodity price move shows up in operating-firm returns. Trap: assuming a hedged producer behaves the same as an unhedged one.
- Confusing MLP tax deferral with tax exemption. MLP distributions are not tax-free. Return-of-capital portions reduce basis. On sale, the lower basis creates a larger gain, often taxed at full rather than preferred rates. Trap: "MLPs eliminate taxes on distributions."
Bottom line
- Physical commodities carry storage costs, wasted convenience yield, and financing costs. Hotelling's growth path is only a ceiling, because innovation (Simon) can lower real prices and shorting is hard.
- Every route to exposure adds friction: producer equities carry equity beta (gold rose 6x, miners 3x), futures ETFs face basis effects, and ETNs and CLNs carry issuer default risk.
- About 50 MLPs (roughly $300 billion) pass income through without entity tax. Midstream is the energy "toll road," and K-1s, state filings, and UBIT are the drawbacks.
- Commodity forwards are capped at F = S × e^((r + c − y)T). The basis converges to zero, calendar spreads bet on carry changes, and positive roll yield is not alpha.
Exam shortcut
For physical commodities, remember "storage, wasted convenience yield, financing." Hotelling is a ceiling; Simon says technology lowers real prices. For vehicles: physical, futures, and equity ETFs; ETNs and CLNs carry issuer credit risk; a principal-protected CLN of the illustrated type is a bond plus a call. For producers: "Not pure plays. Gold 6x, miners 3x. Three drivers: demand elasticity, supply elasticity, hedging." For MLPs: "About 50, roughly $300 billion.
The full lesson (about 16,959 words, 113 min read) adds 2 worked examples, all 11 common mistakes, a self-check, free in the app.
Learning objectives
- natural resources
- land
- timber
- farmland
- contagion indices
- timber farmland returns
- commodities no futures
- commodity producers
- mlps
- term structure
- rolling contracts
- backwardation contango
- commodity diversification
- expected returns
- commodity indices
- commodity returns
- infra overview
- characteristics infrastructure
- primary risks infrastructure
- infrastructure sectors assets
- infrastructure investment styles
- project finance infrastructure
- infrastructure capital structures
- infrastructure risk-return analysis
- economic sensitivities infrastructure
- infrastructure across geographies
- infrastructure investment underwriting
- re categories
- cre advantages
- re styles
- re office
- re industrial retail
- re multifamily
- cre debt
- cre equity leases
- mortgage underwriting
- commercial mortgages
- cre financing
- cre vehicles
- liquid cre
- re development
- cre valuation
- income approach
- public re vehicles
- reit returns
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