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

Type	How It Holds Exposure	Examples
Physically backed	Owns the actual commodity	GLD, SLV, IAU
Futures-based	Holds futures contracts	USO, DBO
Equity-based	Owns commodity producers	GDX, XLE
Exchange-traded commodities	Direct exposure via notes	ETNs

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.