The case against commodities: the zero-real-return critique

Nearly every commodities article, including the sober ones, ends up recommending a small allocation. This one takes the other side seriously, because the case against owning any commodities is stronger than the industry lets on — and for a large share of investors, it's the correct case. If you've read the diversification pitch and felt a nagging suspicion that you're being sold insurance you may never need, this article is that suspicion, argued out fully and fairly.

Argument one: raw materials don't compound

The foundational problem is that commodities have no earnings, no dividends, no interest — they don't compound. A share of stock represents a business that reinvests profits and grows; a bond pays you to wait; a rental property collects rent. A barrel of oil is just a barrel of oil. Over more than a century of data, spot commodity prices have barely kept pace with inflation, because human ingenuity relentlessly makes extraction cheaper, capping real prices over the long run. Whatever return a commodity fund produces comes from collateral interest and roll yield, not from raw materials appreciating. You are, at the core, holding an asset engineered by nature to deliver roughly zero real growth.

Argument two: the diversification often fails when you need it

The whole pro-commodity case rests on low correlation to stocks. But correlation is an average, not a promise, and it has a nasty habit of rising toward one in exactly the crashes where you wanted protection. In the 2008 financial crisis and again in the March 2020 collapse, commodities fell hard alongside stocks as global demand cratered — the diversification evaporated precisely when it was supposed to matter. Commodities only reliably diverge from stocks in supply-shock inflations like 2022. So the honest claim isn't 'commodities hedge downturns'; it's 'commodities hedge one specific type of downturn,' which is a much narrower and less compelling product than the marketing implies.

Argument three: the drag is certain, the payoff is not

This is the asymmetry that sinks commodities for many investors. The costs are guaranteed and continuous: roll drag in the frequent contango years, fund expenses, tax friction from K-1s and mark-to-market income, and the opportunity cost of capital that could have been compounding in stocks. The benefit is occasional and conditional: it shows up only in supply-shock years, only if you happened to own the sleeve beforehand, and only if you rebalanced with discipline. You pay a visible annual premium for insurance that pays off in maybe one year of a decade. For an asset with zero expected real return, that's a lot of certain cost chasing an uncertain, infrequent benefit.

The bars make the asymmetry impossible to unsee: the drag is a wide, certain bar spread across nine quiet years, while the payout is a single narrower bar in one year you had to own the sleeve beforehand to collect. That's the honest shape of the trade — many small certain costs against one larger uncertain benefit — and for a lot of investors, staring at it is enough to settle the question.

Argument four: you may already be hedged

Much of what a commodity sleeve is supposed to do, a well-built portfolio already does more cheaply. Stocks are a decent long-run inflation hedge because companies raise prices. TIPS and I bonds hedge inflation contractually, with no roll drag. A globally diversified equity portfolio already includes energy and materials companies. If your real fear is inflation, TIPS plus stocks cover most of the ground without the futures machinery. The marginal protection a separate commodity sleeve adds — beyond what you already hold — is smaller than it looks once you account for the inflation resilience baked into the rest of the portfolio.

When skipping commodities is clearly right

• You value simplicity and low maintenance — a two- or three-fund portfolio with no K-1s, no roll math, and no special tax forms is a legitimate and excellent choice.
• Your accounts are mostly taxable, where the tax friction of commodity vehicles is worst and hardest to escape.
• You already hold meaningful TIPS or I bonds and a globally diversified stock portfolio — your inflation bases are substantially covered.
• You know you'll performance-chase — buying the sleeve after a hot year and abandoning it after a cold one, which delivers all the drag and none of the rebalancing benefit.
• You have a long horizon and can simply ride equity volatility, for which the historical reward has been a real return commodities structurally cannot match.

The fair rebuttal — and where it lands

To be fair to the other side: a small, roll-optimized, rebalanced commodity sleeve did genuinely cushion the 2022 stock-and-bond rout, and for a disciplined investor who fears supply-shock inflation specifically, 5% is defensible. The case against commodities isn't that they're a scam — it's that they're an optional refinement whose benefits are narrow, conditional, and often already provided elsewhere, while their costs are certain. That's a perfectly respectable thing to skip. The burden of proof should sit on adding a zero-real-return asset with special tax forms, not on leaving it out.

The bottom line

Commodities are the one mainstream asset class it's entirely reasonable to own none of. They don't compound, their diversification fails in demand-driven crashes, their costs are certain while their payoff is rare and conditional, and much of their supposed inflation protection is already delivered by the stocks and TIPS you likely hold. A small, disciplined, rebalanced sleeve is defensible for someone who specifically fears supply-shock inflation and will manage it rigorously. But for the investor who values simplicity, holds mostly taxable accounts, or suspects they'll performance-chase, the honest answer is the simplest one: skip commodities, hold a diversified stock-and-bond portfolio with some inflation-protected bonds, and don't lose a minute of sleep over the sleeve you chose not to own.