Commodity ETFs Explained: Types, Examples, and Risks

Many investors consider commodities when they want to diversify a portfolio. Owning the physical goods is harder. Gold bars need secure storage, and their purity has to be verified before you can sell them. Commodity ETFs remove most of that friction. They offer a simple way to gain exposure to commodities such as gold and silver without holding them directly. Still, many investors are unsure where to start.

In this article, you will learn what commodity ETFs are, the main types, their risks and costs, and how to use them to diversify your portfolio.

What Are Commodity ETFs?

A commodity ETF is an exchange-traded fund that gives exposure to commodities by holding the physical commodity, futures contracts, or shares of producers. It trades on a stock exchange like any other listed fund. Some funds focus on a single commodity, such as gold stored in a vault. Others track a broad commodity index and spread their exposure across many markets through futures contracts.

Commodities fall into four broad groups. Precious metals include gold and silver, and industrial metals include copper. Energy covers products such as crude oil. Agriculture covers crops such as wheat and coffee.

Why investors use them

The usual reasons are diversification and inflation sensitivity. Commodity prices often respond to different drivers than company earnings do. Investors therefore add commodity ETFs to hedge against inflation, or to hold something that may behave differently when stocks struggle.

Like any investment, commodity ETFs carry risk and do not guarantee a profit. Access is another reason. Buying and storing bullion is impractical for most people while buying a fund share takes one order from a phone.

Academic research supports part of that reasoning, with limits. Baur and Lucey (2010) studied gold, stocks and bonds in the US, UK and Germany from 1995 to 2005. Gold acted as a hedge against stocks on average. It also acted as a safe haven during extreme market declines, but the effect lasted only about 15 trading days. Gold was not a safe haven for bond investors in any of the three markets.

What they do not do

Physically backed commodity ETFs produce no income. The iShares Silver Trust lists its distribution frequency as none, because silver bars pay no dividend or interest. That makes them different from the income-producing assets that pay you while you hold them. A commodity position only pays off through price movement.

What Are the Types of Commodity ETFs?

Four structures cover almost everything on the market. The differences matter more than the ticker.

Physically backed funds exist mainly for precious metals, because storing gold is practical and storing crude oil is not. Energy and agricultural funds are therefore usually futures-based. Their returns depend partly on the shape of the futures curve, not only on today's price.

Which Commodity ETFs Do Investors Search For Most?

Three tickers dominate the questions. Each illustrates one of the structures above.

GLD: the SPDR Gold Shares

GLD holds physical gold bars and aims to reflect the price of gold bullion, less the trust's expenses. It launched in November 2004 as the first US-listed ETF backed by a physical asset. Its expense ratio is 0.40% a year. State Street notes that for many investors, buying shares and paying the fund's expenses costs less than buying, storing and insuring bullion directly.

SLV: the iShares Silver Trust

SLV is the silver equivalent. It launched in April 2006, tracks the LBMA Silver Price and charges a sponsor fee of 0.50%. Its fact sheet for June 30, 2026 shows 479,760,526 ounces in the trust, about 14,922 tonnes, and net assets of $28.19 billion.

Silver is more volatile than gold, and the numbers show it. The trust reported a three-year standard deviation of 43.07%.

GDX: the VanEck Gold Miners ETF

GDX is the equity version. It holds shares in gold mining companies rather than gold itself, tracking the MarketVector Global Gold Miners Index. Its summary prospectus dated May 1, 2026 puts total annual operating expenses at 0.51%. The fund is non-diversified and holds at least 80% of assets in index securities.

Miners are not a clean substitute for the metal. Their profits depend on production costs, debt and management decisions as well as the gold price, so the two can move apart.

How Do Popular Commodity ETFs Compare?

The table puts the three funds above next to a broad basket, an energy fund and an agriculture fund. Figures come from each issuer's own documents on the dates shown.

Two things stand out. The futures funds cost more than the physical metal trusts. They also carry the roll effects covered in the risks section below.

Is There a Vanguard Gold ETF?

No. Vanguard does not offer a physically backed gold ETF, which surprises many investors who use Vanguard for everything else. The closest option in its own range is the Vanguard Global Capital Cycles Fund. It commits at least 25% of assets to precious metals and mining securities. The fund was renamed from the Vanguard Precious Metals and Mining Fund in 2018, when its mandate was broadened.

Two differences matter. It is a mutual fund rather than an ETF, and it holds mining companies rather than metal. Investors wanting direct gold exposure therefore use funds from other issuers. That is a product gap, not a judgement about any provider.

Gold ETF or Physical Gold: What Is the Difference?

Both give you exposure to the gold price. Everything else about them differs.

The honest summary is that the ETF wins on convenience and cost, while physical metal wins on possession.

Which matters depends on why you want gold. If the reason is portfolio diversification, a fund does the job. If the reason is holding an asset outside the financial system, a fund does not.

What Are the Risks and Costs?

Commodity ETFs carry the volatility of the underlying market plus some structural costs that are easy to miss.

1. The fee is paid in metal

A physically backed trust holds bullion in a vault, not cash. To pay the sponsor fee, it sells a small amount of that metal on a regular basis. The silver trust's own documents state that the silver represented by each share decreases over the life of the trust for that reason.

2. Volatility

Precious metals are not a quiet corner of the market. A three-year standard deviation above 40%, as reported for the silver trust, is higher than most broad equity funds. In practice, prices can swing sharply within weeks or even days.

3. No income

Physically backed metal trusts pay nothing while you hold them. A stock or bond fund can pay you during a flat decade, and a metal trust cannot. Gold and silver do not generate earnings, interest, or dividends. If prices stay flat for years, your return is roughly zero before fees and negative after them.

4. Structure risk

Futures-based funds can lag the spot price when contracts are rolled forward at higher prices. This effect, known as contango, can erode returns even when the metal price itself rises. The effect is not a rounding error as a research by Erb and Harvey (2006) found that roll returns explained 91.6% of the long-run variation in commodity futures returns between 1982 and 2004. Contracts with negative roll returns averaged an annual excess return of -4.67% in their sample.

How Are Commodity ETFs Taxed for Non-US Investors?

Many guides on commodity ETF taxes describe rules for US taxpayers. Those include the 28% collectibles rate on physical gold and silver funds, the 60/40 split for futures funds and the Schedule K-1 form.

For a non-US investor, three points usually matter.

• Capital gains. The US generally does not tax non-residents on gains from selling US-listed fund shares. Your home country may still tax those gains under its own rules.

• Distributions. Dividends from US funds are generally subject to 30% US withholding tax for non-residents. A tax treaty between the US and your country may lower that rate if a valid W-8BEN form is on file. Physically backed trusts such as GLD and SLV pay no distributions, so this rarely affects them. GDX and PDBC can pay distributions.

• Partnership funds. Some futures funds, including USO and DBA, are structured as partnerships. Since 2023, US brokers must generally withhold 10% of the gross proceeds when a non-US investor sells units in a publicly traded partnership. That is 10% of the whole sale amount, not only the gain. Check a fund's structure in its prospectus before buying.

Tax outcomes depend on where you live and your personal situation. Speak to a qualified tax adviser in your country before acting.

How Do You Buy a Commodity ETF?

You buy them through a brokerage account, in the same way as any listed fund. The decisions before the order matter more than the order itself.

1. Decide which exposure you want: the metal, the producers or a broad basket.

2. Check the structure in the fund's own documents, not the ticker's nickname.

3. Compare the expense ratio against alternatives tracking the same asset.

4. Decide the position size, since commodities are usually a small satellite holding.

5. Check how it fits the rest of your portfolio, including any broad market ETF you already own.

Step 3 is worth a minute. Funds tracking the same metal can charge different fees, and the gap compounds over years.

Conclusion

Before buying any commodity fund, read one line in its documents: what does it actually hold? Bars, futures, and mining shares produce three different outcomes from the same headline metal, and the fund's name alone will not tell you which one you own. Add the costs that come with it, including a fee paid in metal, no income from a metal trust while you wait, and roll effects in futures-based funds, and the structure matters as much as the price of gold or silver.

Commodities usually work best as a small satellite holding beside the rest of your portfolio rather than a core bet.

This content is for educational purposes only and is not investment advice or a recommendation to buy or sell any security. Investing carries risk, including the possible loss of principal. Commodity prices can be highly volatile, and fund details are those published on the dates stated.