The missing ingredient
Walk through the average investor's portfolio and you will usually find two things: stocks and bonds. Maybe a little cash. What is almost always missing is commodities — the raw materials of the real economy: oil, copper, gold, wheat, natural gas.
That omission is a mistake. Commodities are not a side bet; they are a distinct return source with behavior unlike anything else in a portfolio.
What commodities actually do
The defining feature of commodities is their low correlation with stocks and bonds. When equities fall, commodities often do nothing — or rise. When bonds sink because inflation is hot, commodities frequently climb, because inflation is literally their price.
This makes them a genuine diversifier, not just another flavor of the same risk. In portfolio theory, an asset that zigs when others zag is worth holding even if its standalone return is modest.
The 1970s lesson
The clearest demonstration came in the 1970s. Stocks went nowhere for a decade after inflation and the 1973-74 crash. Long-term bonds were devastated by rising rates. Meanwhile, commodities — led by oil and gold — soared. An investor holding even a 10% commodity sleeve dramatically smoothed a brutal decade.
The lesson is not that commodities beat stocks. It is that they protected purchasing power when nothing else did.
The 2000s supercycle
From 2000 to 2010, commodities staged a historic run. China's industrialization sucked in industrial metals, energy, and agriculture at a pace the world had never seen. A broad commodity index roughly tripled, while the S&P 500 returned almost nothing net of the dot-com bust and the financial crisis.
Once again, the asset class that most portfolios ignored was the one that rescued them.
The 2010s hangover
No asset is a permanent winner. From 2011 to 2020, commodities endured a brutal bear market: crude collapsed from over $100 to negative briefly in 2020, gold chopped sideways for years, and agricultural prices stagnated. Investors who piled in at the 2011 peak regretted it.
This is the other half of the lesson: commodities are cyclical and can stay out of favor for a decade. They belong as a satellite, not a core.
2020 to today
The recent era restored the case. Energy spiked with supply shocks, gold reached repeated all-time highs as a hedge against debt and currency debasement, and industrial metals benefited from the green-energy build-out. A small commodity allocation once again cushioned equity drawdowns.
How to own them
Most investors should not buy barrels of oil or tons of copper. The practical routes are:
- Broad commodity index funds that hold a diversified basket.
- Gold directly, via bullion or a low-cost ETF, as the traditional chaos hedge.
- Energy and mining equity funds, though these behave more like stocks than the underlying goods.
The takeaway
A 5% to 10% allocation to commodities will not make you rich, but it reduces tail risk and hedges the exact scenario — surprise inflation — that hurts stocks and bonds at the same time. Most portfolios are missing the one asset class built for that storm.