Commodities—energy, metals, agriculture—respond to supply shocks, weather, inventory data, and geopolitics differently than equities tied to discounted cash flows. Gold often behaves as a hedge against real-rate and currency stress; oil ties to global growth and OPEC+ supply policy; grains react to planting reports and drought maps.
Why commodities in a portfolio
Historical correlation to stocks is imperfect and regime-dependent. Commodities can diversify inflation shocks when equities and bonds both struggle. Size matters: a 3% sleeve behaves differently than 30% concentration.
Access methods
Futures: Standard for professionals; margin, roll costs, and contango/backwardation in curves affect P&L.
ETFs/ETNs: Easier for investors; read prospectuses on roll methodology and tracking error.
CFDs (where legal): Retail access with overnight financing charges; not available in all jurisdictions.
Stocks: Miners and energy producers offer equity beta to commodities with company-specific risk.
Gold vs oil vs agriculture
Gold: Real yields, USD, central bank buying, geopolitical fear. Less about industrial demand than oil.
Crude oil: OPEC+ decisions, inventory (EIA/API), refinery runs, global PMI.
Agriculture: USDA reports, weather models, export bans, freight costs.
Risks specific to commodities
- Gap risk on Sunday futures open after weekend headlines
- Leverage and margin calls in volatile weeks
- Curve shape eating returns in long-only ETF holders
- Thin markets in minor contracts—slippage
Getting started responsibly
Learn one market deeply—often gold or WTI crude—before spreading across lean hogs and cotton. Paper trade futures mechanics if new to margin. Read contract specs: tick size, value per tick, delivery months.
Key takeaways
- Commodities diversify inflation/supply shocks but carry unique risks.
- Futures, ETFs, and equities each have different cost and margin profiles.
- Start with one liquid market; understand rolls, gaps, and contract specs.