A BEGINNER’S GUIDE TO
THEMATIC INVESTING

This article spotlights the essence of thematic investing and how to incorporate this strategy in investment portfolios.

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Thematic investing – focusing on assets that are part of a specific theme or trend – can transform how investors approach their portfolios.

As global megatrends, such as artificial intelligence and climate change, reshape our economy, understanding how to identify and invest in these powerful themes has become more important.

What Is Thematic Investing?

Thematic investing pinpoints trends with future investment potential and invests in these themes rather than specific companies, currencies, bonds, or commodities.

Thematic investing typically prioritises long-term industry trends over short-term investment decisions. Unlike traditional sector-based investing, this approach crosses geographical and industry boundaries to capture opportunities created by transformative global shifts.

Investors are increasingly turning to thematic investing to develop multi-asset portfolios. It is a cross-border strategy that considers international businesses and assets that may profit from changing market circumstances. This global perspective allows investors to capture growth wherever it emerges, whether in Silicon Valley tech firms or Asian renewable energy companies.

The strategy requires a top-down approach to analysing the global economy. This means thematic investing first looks at emerging trends, such as AI, and then zooms in on the companies or economies that stand to benefit from them.

Exchange-traded funds (ETFs) have made thematic investing more accessible than ever. When looking at developing trends, such as electric cars and remote work, investors who wish to profit from such developments can use “thematic” exchange-traded funds (ETFs).

The transition to thematic investing marks a significant shift in how we think about portfolio construction with research focussing on developing trends and their potential for structural change. It is also a way to align your investment portfolio with your personal values, beliefs, and interests, with the potential to benefit from the trend’s growth.

What Are the Current Major Investment Themes?

Several powerful megatrends are influencing the investment landscape. Here are the top themes shaping thematic investing.

Artificial intelligence revolution

The focus of AI growth has shifted from simple chatbot interfaces to a massive build-out of physical AI infrastructure.

Global estimates indicate that the number of internet-connected (IoT) devices has surpassed 21 billion, creating an insatiable demand for edge computing and advanced semiconductor capabilities.

• Beyond Tech Giants: While large-cap firms still dominate, the developing AI Diffusion theme highlights the Humanoid 100 companies which focus on integrating AI into robotics – and data centre operators who are now seen as essential utilities.
• Energy-Hungry AI: A defining current trend is the Power-to-AI link, as investors prioritise companies that can provide the massive, reliable electricity required to keep sovereign AI clouds running.

Clean energy transformation

According to the International Energy Agency (IEA) renewable energy has officially overtaken coal to become the world’s largest source of electricity generation, accounting for approximately 36% of the global power supply.

With energy security and climate goals now intrinsically linked, investment opportunities are expanding beyond traditional solar and wind into System Integration technologies.

• The Age of Electricity: Global power demand is surging at nearly 4% annually – driven by AI data centers and the rapid electrification of transport, all requiring a massive expansion of the world’s power grids.
• Storage and Mobility: Battery storage has become the linchpin of the transition. In the U.S., battery capacity is expected to increase by 53% in 2026 alone to manage the intermittent nature of solar and wind.
• The Nuclear Resurgence: 2026 has seen nuclear power reach record-high output levels globally, as it is increasingly categorised alongside renewables as an essential “low-emissions” backbone for high-demand industries like AI.

Demographic Shifts

The World Health Organisation predicts that by 2030, more than 15% of the world’s population will be aged 60 years or over. The size of that age group will increase from 1 billion in 2020 to 1.4 billion in 2030.

This isn’t just a challenge for public spending; it is a massive engine for growth. Creating high-conviction investment opportunities across healthcare, the “K-shaped” consumer market, and resilient infrastructure.

• Longevity Tech: Investors are targeting companies that enable seniors to remain independent. This includes smart home systems, AI-driven hygiene robots, and telemedicine 2.0 , which now allows for remote surgery and patient-led monitoring.
• The Great Wealth Transfer: In developed nations, the silver generation controls approximately three-quarters of all household wealth. This is driving a boom in high-end leisure (cruises and RVs), specialised wealth management, and wellness brands.
• The “K-Shaped” Consumer: Consumer goods companies are pivoting to a split market. Wealthy older consumers are spending on premium experiences, while lower-to-middle-income households, pressured by inflationary pressure, are favoring value brands and discount retailers, creating a dual-tracked investment opportunity.

Infrastructure and urbanisation

Smart city technologies, sustainable transport, and digital infrastructure are evolving developments. Investors can access exposure to domestic and international infrastructure companies involved in these developments through single stocks or an infrastructure ETF.

Market capitalisation plays a crucial role in theme selection, as larger companies often have more resources to invest in emerging trends.

• Connectivity as a Utility: Digital infrastructure is now treated with the same necessity as water or power. Investment is flowing into last-mile delivery innovations and 5G/6G connectivity to support a hybrid workforce that is no longer tied to urban centers.
• Smart Urbanisation: Infrastructure ETFs are focusing on “Physical Resilience” – building cities that use big data to manage everything from water stress to sustainable transport.

How to Build a Thematic Portfolio

Creating a successful thematic portfolio requires a systematic approach that balances opportunities with risk management. Follow these steps to construct your thematic investment strategy.

1. Identify future trends

Begin by recognising both trends and trendsetters. Consider which types of companies might thrive in the future – for instance, those leveraging blockchain technology or renewable energy solutions. Ask yourself critical questions about each trend:

• Is the shift driven by structural market changes?
• Will it persist long-term or fade quickly?
• Could it lead to significant market disruptions?

2. Select appropriate themes and sectors

Choose themes and industries that align with your preferences and financial goals.

Explore investment pathways, such as thematic ETFs, for example, that offer the potential for more diversification than investing in individual stocks. When selecting themes, consider:

• The correlation between different thematic investments
• Your risk tolerance and investment timeline
• The maturity stage of each theme

3. Choose your investment vehicle

There are several vehicles you can use to implement thematic investments.

• Individual stocks: Offer direct exposure but requires extensive research
• Thematic ETFs: Provides instant diversification within a theme
• SmartPortfolios: Professionally managed thematic portfolios

4. Monitor and rebalance

Portfolio rebalancing is essential for thematic investing success. As themes evolve and market conditions change, regularly review your holdings to ensure they still align with your investment theories.

5. Practise patience

Thematic investing is inherently long-term. Major trends often take years or even decades to fully materialise.

Remember, this strategy relies on a macro-based, top-down approach that aims to pinpoint themes or trends based on predictions of future performance, rather than making investment decisions based on past achievements.

Advantages and Risks of Thematic Investing

Understanding both the benefits and potential drawbacks of thematic investing is crucial for making informed decisions.

Getting Started with Thematic ETFs

For investors looking to begin their thematic investing journey, ETFs offer an accessible entry point.

1. Open an investment account with a platform offering thematic ETFs
2. Research available themes using fund fact sheets and performance data
3. Start with one or two themes. Common guidance is to consider allocating no more than 10-20% of your capital to thematic investments
4. Use dollar-cost averaging to build positions gradually
5. Review and adjust quarterly based on theme performance

These funds offer a relatively low-cost, diversified way to gain exposure to specific themes such as disruptive technologies, renewable energy, healthcare innovation, and more.

Popular thematic investment areas

• Technology and AI: Funds focusing on artificial intelligence, robotics, and automation
• Sustainable energy: Clean energy ETFs that offers exposure to global companies involved in this sector
• Healthcare innovation: Biotechnology and medical device companies
• Digital finance: Fintech and cryptoasset-related investments

Final thoughts

Thematic investing empowers you to invest in tomorrow’s world today by identifying and capitalising on the transformative trends shaping our future. It involves pinpointing potential and investing in themes rather than specific companies, currencies, bonds, or commodities.

The time element of thematic investment should not be underestimated. Not only is there an opportunity cost of tying up capital in long-term positions, but investors are often left wondering if the ideas behind their investment decision will be picked up by enough other investors to trigger the hoped for price rise.

Learn more about thematic investing by visiting the eToro Academy.

Frequently Asked Questions

What is the minimum investment needed for thematic investing?

Most thematic ETFs can be purchased for the price of a single share, often starting from £10 to £50. Many investment platforms allow fractional share purchases, making it possible to start with even smaller amounts.

Are thematic investments suitable for ISA accounts?

Yes, many thematic ETFs are eligible for inclusion in Stocks and Shares ISAs, allowing you to benefit from tax-free growth and income on your investments.

How often should I review my thematic portfolio?

Review your thematic investments quarterly to ensure the underlying trends remain intact. However, avoid overtrading – thematic investing requires patience as trends develop over years.

How does thematic investing differ from traditional sector investing?

Traditional sector investing follows the Global Industry Classification Standard (GICS), grouping companies by their primary business activity, for example, Utilities or Financials. Thematic investing is sector-agnostic, meaning it looks for a single trend that spans multiple industries.

How can you check if a theme is already “priced in” or at risk of becoming a bubble?

This concept relates to “Theme Timing” risk. Use your analysis to identify if investment flows relate to core elements of the theme and “picks and shovels” companies playing a role in the expansion of a sector rather than hype-based companies without clear revenue projections. Also check if a stock or the underlying holdings in a thematic ETF have rising P/E ratios while their earnings remain flat; this is often a sign of market exuberance rather than structural growth.

What is a Core-Satellite approach, and how does it apply to themes?

Many investors use thematic investments as “Satellites” to complement a “Core” portfolio of broad-market index funds such as the S&P 500 Index (SPX500). The intention of this strategy is that the Core provides stability and broad growth while the Thematic Satellites target high-conviction areas like Humanoid Robotics or De-centralised Finance. This allows you to target alpha without exposing your entire portfolio to the higher volatility often found in emerging trends.