Investing · General financial education

Understanding ETFs

An ETF is a fund traded on an exchange. It gives you a share of a basket of investments.

In more detail

Many ETFs track an index. Risk depends on the holdings: countries, sectors and asset classes. The word ETF alone says little about diversification.

Background

Consider index methodology, concentration, ongoing fees and replication. A narrow thematic index can pool shared risks despite having many holdings. Exchange trading also means prices fluctuate.

An example

A sector ETF and a broadly diversified global stock fund can carry very different risks.

A common misconception

An ETF is inherently broadly diversified and safe.

ETF describes the wrapper. Diversification and risk come from the holdings, and losses remain possible.

Source: Investor.gov · Diversification. Last reviewed: 2026-11-01. Editorially reviewed on 2026-11-01. Next review 2027-11-01. Version 0.2.0. Finmon explains. It does not advise. Not investment, tax or legal advice.