Commodity ETFs: Gold, Oil, and More

A commodity ETF gives you exposure to physical goods — gold, oil, silver, agricultural products — without you ever storing a barrel or a bar. These funds let everyday investors add commodity exposure to a portfolio for diversification, inflation protection, or tactical bets on supply and demand.

Types of Commodity ETFs

Physically backed funds work best for precious metals that are easy to store. Futures-based funds handle oil and gas, where storing the physical good is impractical.

Major Commodity ETFs

• GLD (SPDR Gold Shares) — Holds physical gold, the largest gold ETF
• SLV (iShares Silver Trust) — Holds physical silver
• USO (United States Oil Fund) — Tracks WTI crude oil via futures
• DBC (Invesco DB Commodity Index) — Basket of multiple commodities

Why Investors Use Them

1. Inflation hedge — Commodities often rise when fiat currency loses value
2. Portfolio diversification — Low correlation to stocks and bonds
3. Crisis hedge — Gold tends to rally in market stress
4. Tactical exposure — Bet on supply shocks (oil), weather (crops), or demand trends

Risks Specific to Commodity ETFs

• Contango — When future prices exceed spot, futures-based ETFs lose money rolling contracts
• No yield — Commodities don't pay dividends; cost to hold can erode returns
• Volatility — Oil can swing 5–10% in a day on supply news
• Storage costs — Physically backed funds deduct insurance and storage
• Tax treatment — Some commodity ETFs are taxed as collectibles (gold) or partnerships

Contango Explained

Futures-based ETFs must roll expiring contracts into future months. If those future contracts are pricier (contango), the roll costs money — a slow drag that can outweigh gains even when the spot price is flat. This is why USO has historically lagged the spot price of oil over time.

Strategy for Beginners

• Start with gold — Easiest to understand, physically backed (GLD, IAU)
• Keep allocation modest — 5–10% of a portfolio is common
• Avoid leveraged commodity ETFs — Volatility decay compounds quickly
• Understand tax — Gold ETFs may be taxed at collectible rates (up to 28% in the US)

The Takeaway

Commodity ETFs open up an asset class once reserved for futures traders. Used thoughtfully, they add diversification and inflation protection. But they come with quirks — contango, tax rules, and no income — that demand more attention than a plain stock ETF. Start with gold, learn the mechanics, and add breadth as your understanding grows.