Investing | August 23, 2026 | Capstag.com | 12 min read
How to Invest in Commodities: Gold, Oil, and Beyond
Gold hit multiple all-time highs in 2025 and 2026. Oil moved in both directions sharply. Agricultural commodities reached multi-year prices. Yet most investors hold zero direct commodity exposure. Understanding what commodities are, why they belong in a portfolio, and the most practical way to add them is more relevant now than it has been for a decade.
Quick Answer: Commodities are physical goods — gold, silver, oil, natural gas, copper, wheat, corn — that trade in standardised markets globally. For most individual investors, the most practical way to invest in commodities is through commodity ETFs rather than physical ownership or futures contracts. Gold ETFs like GLD (SPDR Gold Shares, 0.40% ER) and IAU (iShares Gold Trust, 0.25% ER) provide direct gold price exposure without storage or insurance costs. Broad commodity ETFs like PDBC (Invesco Optimum Yield Diversified Commodity, 0.59% ER) cover multiple commodities in a single fund. Commodities typically add portfolio diversification and inflation protection because their returns are imperfectly correlated with stocks and bonds.
Most long-term investors build portfolios of stocks and bonds and stop there — treating the rest of the investable universe as either too complex, too speculative, or simply outside their domain. Commodities are frequently in that "too complex" category. Yet according to research cited by Forbes in June 2026, commodities have historically provided a hedge against inflation and diversification benefits due to their low correlation with stocks and bonds. Gold in particular reached all-time highs above $3,100 per ounce in 2025 — delivering double-digit returns in a year when most bonds underperformed — and continued elevated in 2026. As a finance strategist, the case for including a modest commodity allocation in a long-term portfolio is not speculative — it is structural, rooted in the correlation benefits that commodities provide precisely when stock and bond portfolios need them most.
What Are Commodities and How Do They Trade?
A commodity is a raw material or primary agricultural product that can be bought and sold — standardised enough that one unit is interchangeable with another of the same grade and quality. According to Bajaj Broking's investor education materials, commodities are tangible, physical assets whose value derives from their direct utility and supply-demand dynamics rather than from the earnings or growth prospects of a company.
Commodities are broadly divided into four categories: energy commodities (crude oil, natural gas, gasoline), metals (gold, silver, copper, platinum), agricultural commodities (wheat, corn, soybeans, coffee, sugar), and livestock (cattle, hogs). Each trades on standardised futures exchanges — most major commodity futures trade on the CME Group in the US — where buyers and sellers agree on prices for delivery at a specified future date.
Why Invest in Commodities?
Inflation Protection
Commodities are one of the most reliable inflation hedges available to individual investors. When inflation rises, the prices of physical goods — including energy, food, and metals — typically rise with it, as they are inputs to the economy that directly feed into consumer price calculations. According to Forbes's June 2026 analysis of commodity diversification, historically, commodities have tended to rise during inflationary periods, making them a natural hedge against the erosion of purchasing power that damages bond portfolios and compresses equity valuations.
Portfolio Diversification
The low correlation between commodity returns and stock and bond returns is the central diversification argument for including commodities. Commodities move on supply-demand dynamics, weather patterns, energy infrastructure developments, and currency movements — factors largely independent of corporate earnings cycles and interest rate expectations that drive stock and bond markets. Adding an asset with genuinely different return drivers to a portfolio of stocks and bonds reduces the total portfolio's volatility without necessarily reducing its expected return.
Currency Hedge
Many commodities — gold and oil most notably — are globally priced in US dollars. When the US dollar weakens, commodity prices typically rise in dollar terms to compensate, providing a natural hedge for US investors whose purchasing power is being eroded by dollar weakness. According to Forbes's analysis, commodities can help protect portfolios when the dollar weakens or when broad market stress occurs.
The Main Commodities and What Drives Their Prices
| Commodity | Category | Primary Price Drivers | Main ETF |
|---|---|---|---|
| Gold | Precious Metal | Real interest rates, dollar strength, safe-haven demand | GLD, IAU |
| Silver | Precious/Industrial Metal | Gold price, industrial demand (solar panels, electronics) | SLV |
| Crude Oil | Energy | Global demand, supply decisions, storage levels | USO, BNO |
| Natural Gas | Energy | Weather (heating/cooling demand), storage levels, exports | UNG |
| Copper | Industrial Metal | Manufacturing activity, construction, EV demand | CPER |
| Wheat / Corn | Agricultural | Weather, harvest yields, export demand | WEAT, CORN |
Gold as a Portfolio Asset: The Investment Case
Gold is the most widely discussed commodity investment and the one most commonly added to diversified portfolios for a specific structural reason: it tends to hold its value or rise during periods of financial market stress, when stock portfolios are falling and uncertainty is high. According to the World Gold Council's data, central banks globally bought more than 1,000 tonnes of gold in both 2022 and 2023, with purchases continuing at elevated levels in 2024 and 2025 — representing the highest sustained level of central bank gold buying in decades and providing structural institutional demand underneath the market price.
Gold reached an all-time high above $3,100 per ounce in early 2025 and remained elevated above $2,900 through mid-2026 according to market data. The drivers behind this sustained rally include negative real interest rates in earlier periods, US dollar weakness, elevated central bank buying, and increased demand from investors seeking assets outside the traditional financial system. Whether these factors persist determines whether gold continues to outperform from current elevated levels — a question no analyst can answer with certainty.
Gold Pays No Income: Unlike stocks (which pay dividends) or bonds (which pay interest), gold generates no yield or income. Its entire return comes from price appreciation — which means holding gold in a taxable account generates annual tax obligations only when sold, unlike dividend-paying assets. The case for gold is purely as a portfolio diversifier and store of value, not as an income-generating asset. Investors seeking commodity exposure with some income component are better served by commodity producers (mining stocks, energy companies) or broad commodity ETFs that include energy futures, which can generate roll yield in certain market structures.
How to Invest in Commodities: Four Practical Methods
Commodity ETFs — The Most Practical Approach
Commodity ETFs are the most practical and cost-efficient route for most individual investors. They provide price exposure to commodities without the complexity of futures contracts, the physical logistics of owning bullion, or the company-specific risk of commodity producer stocks.
| ETF | Commodity Exposure | Expense Ratio | Structure |
|---|---|---|---|
| SPDR Gold Shares (GLD) | Physical gold | 0.40% | Physical-backed |
| iShares Gold Trust (IAU) | Physical gold | 0.25% | Physical-backed |
| iShares Silver Trust (SLV) | Physical silver | 0.50% | Physical-backed |
| Invesco Optimum Yield Diversified Commodity (PDBC) | Broad basket (energy, metals, agriculture) | 0.59% | Futures-based |
| iShares GSCI Commodity Dynamic Roll ETF (COMT) | Broad basket | 0.48% | Futures-based |
Physical-backed ETFs — GLD, IAU, SLV — directly hold the physical commodity in vaults. The ETF's price closely tracks the spot price of the commodity. Futures-based ETFs — PDBC, COMT — hold futures contracts rather than physical commodities, which introduces roll yield dynamics (the cost or benefit of rolling expiring futures contracts into the next month) that can cause the ETF's return to diverge from the spot commodity price over time.
Physical Ownership
Physical gold and silver can be purchased as coins, bars, or bullion directly from dealers. Physical ownership provides outright possession of the asset without counterparty risk, but introduces storage costs, insurance requirements, and potential liquidity challenges when selling. For most investors, the lower expense ratios and complete liquidity of a physical-backed gold ETF like IAU make it a more practical choice than physical bullion ownership.
Commodity Producer Stocks
Investing in companies that produce commodities — mining companies, oil producers, agricultural businesses — provides indirect commodity exposure while adding the equity return potential (dividends, earnings growth) that physical commodities do not offer. The trade-off is that commodity producer stocks carry company-specific risk beyond the commodity price itself — operational issues, management decisions, debt levels, and hedging policies all affect the stock's performance independent of where the commodity price goes.
Commodity Futures (Advanced — Not Recommended for Most)
Commodity futures contracts — agreements to buy or sell a fixed quantity of a commodity at a fixed price on a future date — are the instrument that professional commodity traders use. They require a futures trading account, margin management, active monitoring, and a thorough understanding of contract roll mechanics. For individual long-term investors, commodity futures are significantly more complex and operationally burdensome than ETFs without offering meaningful advantages for the typical buy-and-hold allocation.
How Much Commodity Allocation Makes Sense?
Commodities are best viewed as a satellite allocation within a diversified portfolio — not as a core holding equivalent to stocks or bonds. According to Forbes's June 2026 analysis, most financial advisors suggest keeping commodity exposure to around 5% to 10% of a portfolio, recognising that commodities can be volatile and are best suited for long-term investors who can tolerate price swings.
Within that allocation, gold is the most commonly held individual commodity, often representing the entire commodity sleeve for investors who want inflation protection and diversification without the complexity of managing multiple commodity positions. A 5% gold allocation through IAU, rebalanced annually, is a simple and well-precedented approach to adding commodity exposure without the overhead of managing multiple positions across different commodity types.
From a Risk Management Perspective: The primary risk of commodities is price volatility that is disconnected from underlying business value — because commodities have no earnings, no dividends, and no management team improving the underlying business, their price is purely supply-demand driven and can swing dramatically in short periods. Oil dropped more than 60% in 2014–2016. Gold fell 40% from 2011 to 2015. Agricultural commodity prices can move 30–50% in a single growing season based on weather. A 5–10% portfolio allocation is appropriate for these characteristics; a 30% allocation would introduce commodity volatility into the portfolio's overall behaviour in a way that most investors would find difficult to hold through.
Conclusion
Commodities offer a genuinely distinct return stream — inflation protection, dollar weakness hedging, and low correlation with stocks and bonds — that makes a modest allocation strategically valuable in a long-term diversified portfolio. For most individual investors, a 5% allocation to a physical gold ETF like IAU or a broad commodity ETF like PDBC, held as a permanent satellite position and rebalanced annually, captures the diversification benefit without the complexity of futures trading or the logistics of physical ownership. Gold's sustained rally above $2,900 per ounce through 2025 and 2026 is a reminder that the periods when commodities deliver their largest diversification benefit are precisely the periods when traditional stock and bond portfolios are under the most stress. For more on how this allocation fits into the broader portfolio picture, see our complete guide on How to Use ETFs to Build a Complete Investment Portfolio.
✅ Key Takeaways
- Commodities are physical raw materials — gold, silver, oil, copper, wheat — that trade in standardised global markets and provide returns driven by supply-demand dynamics rather than corporate earnings
- The primary portfolio benefits of commodities are inflation protection and diversification — their returns are imperfectly correlated with stocks and bonds, reducing overall portfolio volatility
- Gold reached all-time highs above $3,100 per ounce in 2025, supported by sustained central bank buying above 1,000 tonnes per year and dollar weakness
- For most individual investors, commodity ETFs are the most practical route — IAU (iShares Gold Trust, 0.25% ER) for gold exposure, PDBC (0.59% ER) for a broad commodity basket
- Physical-backed ETFs (GLD, IAU, SLV) hold the actual commodity in vaults and closely track spot prices; futures-based ETFs (PDBC) may diverge from spot prices due to roll yield dynamics
- Gold generates no income — its entire return is price appreciation; commodity producer stocks add equity return potential but also company-specific risk
- Most financial advisors recommend keeping commodity exposure to 5–10% of total portfolio value, used as a satellite allocation rather than a core holding
Frequently Asked Questions
What is the easiest way to invest in gold?
The easiest way for most individual investors to invest in gold is through a physical gold ETF such as IAU (iShares Gold Trust, 0.25% expense ratio) or GLD (SPDR Gold Shares, 0.40% expense ratio). Both hold physical gold in secured vaults and their prices closely track the spot gold price. They can be bought and sold through any standard brokerage account like any stock or ETF, without the storage costs, insurance requirements, or liquidity challenges of physical gold bullion ownership.
Why do investors buy gold?
Investors buy gold primarily for three reasons: as an inflation hedge (gold prices historically rise with inflation), as a portfolio diversifier (gold returns are imperfectly correlated with stocks and bonds), and as a safe-haven asset during periods of financial market stress. According to the World Gold Council's data, central banks globally have also been buying gold at historically elevated levels, providing structural institutional demand that has supported prices through multiple market conditions.
What is the difference between a commodity ETF and a commodity futures ETF?
A physical commodity ETF directly holds the physical commodity in secured vaults — its price closely tracks the spot price of the commodity. A futures-based commodity ETF holds futures contracts rather than the physical good, which introduces roll yield dynamics as expiring contracts are rolled into the next month. Roll yield can be positive (contango structure) or negative (backwardation structure) and causes the futures ETF's return to diverge from the spot commodity price over time — making physical-backed ETFs generally preferable for gold and silver exposure where physical alternatives exist.
How much of my portfolio should be in commodities?
Most financial advisors recommend keeping commodity exposure to around 5% to 10% of a total portfolio, according to Forbes's June 2026 analysis. Commodities can be highly volatile — oil fell more than 60% in 2014–2016, gold fell 40% from 2011 to 2015 — and are best positioned as a satellite allocation rather than a core holding. A 5% gold ETF allocation through IAU, rebalanced annually, is a simple and well-precedented starting point.
Can I invest in oil through an ETF?
Yes — ETFs like USO (United States Oil Fund) and BNO (United States Brent Oil Fund) provide exposure to crude oil prices through futures contracts. However, oil ETFs based on futures contracts can significantly underperform the spot price of oil due to roll yield costs in contango market structures — a persistent issue that has caused long-term holders of oil ETFs to experience returns substantially worse than the underlying commodity's spot price performance. For oil price exposure, many investors prefer integrated energy company stocks or broad energy sector ETFs (XLE) rather than direct oil futures ETFs.
Does investing in commodities protect against inflation?
Yes, historically. Commodities are physical inputs to the economy, so their prices tend to rise during inflationary periods as the cost of producing goods increases. Energy commodities in particular are directly embedded in consumer price indices. Gold has served as a long-run store of value through inflationary episodes across multiple centuries. TIPS (Treasury Inflation-Protected Securities) are an alternative inflation hedge within the bond universe for investors who prefer not to hold commodity exposure directly.
This article is for educational purposes only. The information provided reflects general financial principles and does not constitute personalised financial, tax, or legal advice. Always consider your own financial circumstances before making any decisions.
