Commodities — Gold, Oil, Wheat

Physical goods as investments and how to access them without a warehouse

7 min read Intermediate

"Gold does not pay dividends. Oil does not compound. Wheat does not split. And yet, commodities have been stored as wealth for thousands of years. Here is why — and how to access them without a warehouse."

For educational purposes only. Nothing in this chapter is financial advice. All figures are illustrative examples. Tax rules, account types, contribution limits, and regulations differ by country and change over time. Always verify current rules with official government sources or a qualified financial adviser before making any investment decisions.

What Are Commodities?

Commodities are raw physical goods — things extracted from the ground, grown on farms, or refined from natural resources. They are standardised: a barrel of Brent crude oil is interchangeable with any other barrel of Brent crude. A troy ounce of gold is identical regardless of where it was mined.

⛏️ Hard Commodities

Extracted or mined from the earth.
Examples: Gold, silver, copper, oil, natural gas, iron ore, lithium

🌾 Soft Commodities

Grown or farmed.
Examples: Wheat, corn, coffee, sugar, cotton, soybeans, cattle

Unlike stocks, commodities pay no dividends. Unlike bonds, they pay no coupons. Their return comes entirely from price appreciation — which is driven by supply, demand, weather, geopolitics, and currency movements. They are volatile, cyclical, and complex. They are also genuinely useful as part of a diversified portfolio for specific reasons.

How to Invest in Commodities

You almost certainly do not want to take physical delivery of a barrel of oil or a sack of wheat. There are four practical ways to get commodity exposure:

Method	How it works	Suitable for
Commodity ETF	Tracks a commodity index or holds futures contracts. e.g. iShares Physical Gold ETF, SPDR S&P 500 Energy.	Most investors — simple, liquid, low cost
Physical gold/silver	Buy actual coins or bars from a dealer. Store at home or in a vault.	Gold specifically — impractical for oil or wheat
Mining stocks	Shares in companies that extract the commodity. Adds company risk but also dividend income.	Investors comfortable with equity analysis
Futures contracts	Agree to buy/sell a commodity at a fixed price on a future date. Highly leveraged.	Professionals only — unsuitable for retail

Gold: The Inflation Hedge Argument

Gold has been used to store value for thousands of years. It does not corrode, is universally recognised, and cannot be printed by governments. These properties make it an inflation hedge — when currencies lose purchasing power, gold has historically held its value.

The evidence is nuanced. Over very long periods (decades), gold does roughly track inflation. Over medium periods (5-10 years), it can significantly over or underperform. It produces no income — no dividends, no coupons. It just sits there. Its return comes purely from whether other investors want to own it more or less urgently than they do today.

When gold tends to do well

High inflation, especially if real interest rates are negative
Geopolitical crises — investors flee to perceived safety
Dollar weakness — gold is priced in USD, so falls in the dollar raise gold's price
Banking system stress — investors distrust financial institutions

Most portfolio allocation frameworks suggest 5-10% in gold at most, if you choose to hold it at all. It is not a core holding for most investors. It is portfolio insurance — expensive to hold long-term, but occasionally very useful.

Questions People Actually Ask

Should I put money in gold?

Gold can make sense as a small allocation (5-10%) for diversification and inflation protection. It historically has low correlation with stocks and bonds, meaning it often moves independently. But it pays no income, has storage costs if held physically, and has long periods of flat or negative real returns. It is not a replacement for a diversified stock portfolio — it is an addition to one.

Why do commodity prices fluctuate so much?

Commodity prices are driven by supply and demand imbalances, which can shift rapidly. Weather affects agricultural yields. Geopolitical events disrupt oil supply. Mining strikes reduce metal output. And because commodities are often priced in US dollars, currency movements affect prices globally. Unlike stocks, there are no earnings to anchor the valuation — price is purely supply vs demand.

What is the best way to invest in oil?

For most retail investors, an energy ETF (e.g. iShares S&P 500 Energy Sector ETF) is more practical than an oil futures ETF. The reason: futures-based ETFs suffer from "roll costs" — when a futures contract expires, the fund must buy the next contract, often at a higher price. This "contango" erosion can significantly underperform the spot price of oil over time. Energy company stocks capture oil exposure with dividends as a bonus.

Are commodities good for a beginner investor?

Not as a primary investment. Commodities are volatile, produce no income, require understanding of complex supply-demand dynamics, and are often best accessed through derivatives that carry additional complexity. A globally diversified equity index fund already contains companies in the energy, mining, and agricultural sectors — giving you indirect commodity exposure without the added complexity.

Key Takeaways

Commodities are physical goods — hard (mined) or soft (grown). They are standardised and interchangeable.
They pay no income. Return comes purely from price changes driven by supply, demand, weather, and geopolitics.
For retail investors, commodity ETFs or energy/mining stocks are far more practical than futures contracts or physical storage.
Gold works as an inflation hedge and portfolio diversifier over very long periods — but produces no income and has high volatility in the medium term.
Keep commodity exposure small (0-10% of portfolio) unless you have a specific view or diversification need.