Commodity ETF.
In plain English
A commodity ETF lets you invest in raw materials, energy, metals, or agriculture, without storing barrels of oil or bushels of wheat. Some hold the physical commodity, common for gold, but many use futures contracts. Futures-based funds face a quirk called roll cost: as contracts expire they must be replaced, and if longer-dated contracts cost more, the fund loses a little value each roll, so it can lag the commodity's spot price over time. Commodity funds are volatile and are usually a small diversifier, not a core holding.
01Why it matters
Commodity ETFs are an easy way to add materials exposure, but futures-based funds can quietly lag the commodity itself through roll costs, so knowing that prevents a surprising underperformance.
02The math, step by step
An oil ETF holding futures gains less than crude oil's spot price over a year because each time it rolls expiring contracts into pricier later ones, it loses a bit, a drag called negative roll yield.
03What this is NOT
A futures-based commodity ETF does NOT track the spot price exactly. Roll costs can cause it to lag the commodity over time, so it is not the same as owning the physical material.
04Receipts
Every figure on this page is sourced to a primary document. Tap to open the original.
Plain-English answers from our glossary. Receipts included. Never advice.
Educational tool. Answers come only from ClearMoneySchool's published glossary and are not advice. Why we never give advice