Investors often aim to balance diversification with the potential for higher returns. While broad-market ETFs — like those tracking the ASX 200 or MSCI World — provide exposure across a wide range of industries, some investors choose to deliberately overweight certain sectors they believe have stronger growth potential. This approach, known as a sector tilt, can be implemented in different ways — and one increasingly popular method is through thematic ETFs.

This article explores what sector-tilt strategies are, how thematic ETFs can be used to achieve them, and the potential benefits and risks of doing so. We’ll also look at real-world examples and tools available to Australian investors for research and comparison.

What is a sector tilt?

A sector tilt is an intentional shift in a portfolio’s allocation to give more weight to specific industries or sectors than a broad-market index would.

• Example: The S&P/ASX 200 might allocate around 30% to financials and less than 5% to healthcare. If you believe healthcare will outperform, you might increase your portfolio’s healthcare exposure to 10–15%, creating a tilt .

The key difference from standard diversification is purpose . A broad-market ETF aims to track overall market performance, while a tilt is a deliberate overweight (or underweight) to align with:

• Growth expectations – capitalising on emerging trends or booming industries.
• Economic cycles – shifting towards sectors likely to benefit from current conditions.
• Personal conviction or values – such as supporting renewable energy or technology innovation.

Thematic ETFs 101

A thematic ETF is an exchange-traded fund that invests in companies aligned with a specific theme or trend — which may map to a single sector or span several.

Differences from sector ETFs:

• Sector ETF: Focuses purely on one GICS-defined sector (e.g., financials, materials, healthcare).
• Thematic ETF: May include companies from multiple sectors but united by a shared trend (e.g., robotics, clean energy, cybersecurity).

Popular themes among Australian and global investors include:

• Clean energy (e.g., renewable power producers, battery technology).
• Cybersecurity (e.g., global network security firms).
• Healthcare innovation (e.g., biotech, medical devices).
• Digital infrastructure (e.g., data centres, 5G networks).

While sector ETFs provide a direct overweight to one industry, thematic ETFs can offer a more nuanced tilt — sometimes cutting across industries but still targeting a focused opportunity.

Potential benefits of sector tilting with thematic ETFs

While sector-tilting strategies can be inherently risky, its proponents hope to achieve certain benefits:

1. Capturing potential growth

Thematic ETFs allow investors to focus on industries or trends they expect to outperform the broader market. For instance, if renewable energy adoption accelerates, a clean energy ETF could benefit more than a general market ETF.

2. Expressing investment views or values

A thematic ETF can reflect personal beliefs — such as sustainability or technological progress — without requiring direct stock-picking. This approach can align portfolios with environmental, social, or governance (ESG) priorities.

3. Diversification enhancement

While tilting increases exposure to specific sectors, it can still provide diversification compared to holding a few individual stocks. A well-chosen thematic ETF will spread investments across multiple companies within the theme, reducing company-specific risk.

Risks and considerations

While sector tilts can be rewarding, they carry additional risks . Some potential concerns include:

1. The potential for underperformance – If the chosen sector lags, your overall portfolio may underperform against a broad index.
2. Higher volatility – Sectors can experience sharp swings in price, especially those linked to emerging technologies.
3. Concentration risk – A heavy tilt reduces diversification, meaning poor performance in that area has a larger impact.
4. Understanding the product – Investors should look beyond the ETF’s name and examine:
   • Holdings – Are the companies genuinely aligned with the theme?
   • Index methodology – How are companies selected and weighted?
   • Fees – Thematic ETFs often have higher expense ratios than plain-vanilla index funds.

Applying a sector tilt in practice

1. Supplementing a core portfolio

A common strategy is the core-satellite approach . As its name suggests, it's comprised of two components:

• Core: Broad, low-cost ETFs providing overall market exposure.
• Satellite: Smaller allocations to thematic ETFs to introduce sector tilts.

2. Strategic vs. tactical tilts

• Strategic tilt: Long-term conviction (e.g., belief in long-term growth of healthcare innovation).
• Tactical tilt: Shorter-term view based on current trends or events (e.g., energy sector after a supply shock).

3. Entry methods

• Dollar-cost averaging (DCA) : Investing fixed amounts at regular intervals to smooth entry prices.
• Lump sum investing : Suitable if you have high conviction and want immediate exposure — but riskier if the sector corrects soon after entry.

(Side note: for a deeper comparison on these two strategies, see our article on DCA vs lump sum investing .)

4. Managing risk

• Set allocation limits: Avoid overexposure — for example, limit a tilt to 5–15% of your portfolio.
• Rebalance: Periodically restore target weights to prevent a winning tilt from dominating the portfolio.

Examples & case studies

To give you an idea of how these strategies might appear in the real world, let's look at a few hypothetical case studies.

Technology tilt via a thematic ETF

An investor believes artificial intelligence (AI) will drive long-term growth. They keep 80% of their portfolio in broad-market ETFs and add 10% to a global AI-focused ETF (holding semiconductor, cloud computing, and robotics companies).

Renewable energy focus

A thematic ETF like BetaShares Global Sustainability Leaders ETF (ETHI) offers exposure to global companies aligned with clean energy and sustainability. For someone looking for an ESG-friendly tilt, an ETF like this one might sit well in their portfolio.

Infrastructure expansion

Global X Global Infrastructure ETF (GLIN) provides access to infrastructure operators — a potential beneficiary of increased government spending — giving the investor targeted exposure while still maintaining geographic diversity.

NOTE: neither of the above are recommendations, but simply an example of funds which could theoretically provide a sector-tilt.

Further research

When evaluating thematic ETFs for a sector tilt, key areas to research include:

• Index methodology – Who defines the theme and how companies are selected.
• Holdings breakdown – Check top holdings and sector allocations.
• Performance history – While past performance doesn’t guarantee future results, it can show volatility patterns.
• Fees – Compare management costs against alternatives.
• Liquidity – Higher liquidity generally means tighter bid–ask spreads.

Final thoughts

Sector-tilt strategies can be a useful way to align a portfolio with personal convictions, anticipated market trends, or long-term growth areas. Thematic ETFs may offer a convenient, diversified vehicle for implementing these tilts without the complexity of selecting individual stocks.

However, a sector tilt increases both potential rewards and risks — including concentration and volatility. Understanding the ETF’s underlying holdings, index methodology, and costs is essential before committing.

By pairing a diversified core portfolio with carefully researched thematic ETFs, investors can express their views on the future while still maintaining an appropriate risk balance.