ETF types explained: Common building blocks for portfolios

Key takeaways:

• ETF types can serve different portfolio roles, but each fund should be assessed against goals, risk tolerance, time horizon, costs and underlying holdings.
• Broad market ETFs can provide exposure to large parts of the market in one fund, while sector ETFs offer more targeted industry exposure and may be more concentrated.
• Bond ETFs can provide fixed-income exposure and possible distributions, but prices and income can fluctuate due to interest rates, credit risk and market liquidity.
• International ETFs can broaden geographic exposure, while thematic ETFs focus on specific trends or innovations but may vary widely in holdings and concentration.
• Leveraged, inverse and synthetic ETFs are more specialised products that can involve additional risks, including magnified losses, daily reset effects and counterparty exposure.

Exchange-traded funds (ETFs) come in a variety of types, each designed to serve different investment objectives. Understanding these different ETF categories can help you compare products and consider how different funds may fit your financial goals, risk tolerance and time horizon. Let's explore the main types of ETFs.

Note: ETFs are investments and their value can fall as well as rise; you may get back less than you invest.

Broad market ETFs: Broad exposure in one fund

Broad market ETFs track major indices like the S&P 500, MSCI World, or STOXX Europe 600. These funds can provide broad exposure to large segments of the market with a single purchase.

Illustrative example: Investing €10,000 in an MSCI World ETF can provide exposure to around 1,500–1,600 companies across developed markets, although index constituents change and diversification does not eliminate the risk of loss.

Sector ETFs: Targeting specific industries

Sector ETFs focus on companies within particular industries such as technology, healthcare, or energy. These funds can increase exposure to specific sectors, but they can also be more concentrated than broad market ETFs.

Illustrative example: A clean energy ETF can provide targeted exposure to companies developing solar, wind and other sustainable technologies without requiring investors to pick individual companies, but returns still depend on the fund’s holdings, valuation, costs and sector performance.

Bond ETFs: Fixed income made accessible

Bond ETFs hold portfolios of bonds. They may provide income distributions and may be less volatile than equities, but bond prices can fall (for example, when interest rates rise or credit spreads widen).

Illustrative example: An income-focused investor might compare corporate bond ETFs by yield, duration, credit quality, distribution frequency, costs and liquidity. These ETFs may pay regular distributions, but income and capital values can fluctuate, and liquidity or bid-ask spreads can worsen in stressed markets.

International ETFs: Going global

International ETFs focus on specific countries or regions, allowing investors to gain exposure to markets outside their home country. These range from developed markets like Japan and Germany to emerging markets like Brazil and India, and may introduce currency, political, liquidity and regulatory risks.

Illustrative example: A European investor wanting exposure to Asian markets could consider an Asia-Pacific ETF rather than buying shares directly on multiple foreign exchanges, while still reviewing the fund’s currency exposure, costs, holdings and risks.

Thematic ETFs: Investing in trends and innovations

Thematic ETFs focus on specific trends, innovations, or themes like artificial intelligence, cybersecurity, or ageing populations. These funds aim to include companies across multiple sectors with exposure to those themes, but the definitions of those themes and their holdings can vary widely.

Illustrative example: A fintech ETF may include payment processors, banking technology firms and, depending on the fund methodology, companies with cryptocurrency-related exposure. Investors should review the holdings because thematic ETFs can be concentrated and definitions vary by provider.

The specialized category: Approach with caution

Leveraged ETFs

These funds aim to deliver multiples (2x or 3x) of their underlying index's daily return. While they can amplify gains, they also magnify losses and are generally unsuitable for most long-term buy-and-hold investors. Because leveraged and inverse ETFs typically reset daily, their performance over periods longer than a day can differ significantly from the multiple/inverse of the index’s return due to compounding and volatility.

Inverse ETFs

Designed to move in the opposite direction of their benchmark, these funds often increase in value when their target index falls, usually on a daily basis. They're primarily used as short-term hedging or tactical tools rather than long-term investments, and their performance can diverge over longer periods.

Synthetic ETFs

Unlike physical ETFs that directly own the underlying assets, synthetic ETFs may use swaps or derivatives to replicate performance. This scan introduces counterparty risk, although structures often include collateral; protections vary by product.

Risk highlight: A leveraged ETF targeting 3x daily returns of an index that drops 10% in a day would lose approximately 30% of its value, before fees and tracking effects. Over longer periods, these funds can deviate significantly from their stated multiple of the index's total return due to compounding.

Understanding these ETF building blocks can help investors compare fund types and consider how different ETFs may fit their investment goals, risk tolerance, and market outlook.