4 Major Investment Themes to Watch in 2026

Amid persistent geopolitical tensions, accelerating technology, and mounting pressure on resources, the global economic environment enters a new phase. For investors, it is no longer just about following short-term markets, but about identifying the major secular dynamics capable of sustaining growth and corporate valuations over the long term.

In 2026, certain themes stand out clearly. The rearmament of states and the rising security concerns, the widespread adoption of artificial intelligence and the emergence of quantum computing, as well as the battle over strategic resources and critical raw materials, are shaping a world that is more fragmented, yet rich in investment opportunities for those who know how to invest in stocks with a long-term perspective.

Discover Café de la Bourse’s analysis of the 4 investment themes to absolutely follow in 2026, with our analysis of stocks and ETFs to position yourself.

Defence and Security: a Sustainable Global Re-arming

Defense and security remain among the essential investment themes in 2026. After several decades during which these topics were deprioritized, the international context has profoundly changed. The war in Ukraine, persistent tensions in the Middle East, rivalries among great powers, and the proliferation of cyberattacks have brought the issue of security back to the forefront of national priorities.

This evolution is reflected very concretely in a sustained rise in military budgets, especially in Europe, where many countries seek to close gaps and strengthen their defense autonomy. Beyond traditional weapons, investments also concern cybersecurity, surveillance, space, and the protection of critical infrastructure. It is no longer about responding to a crisis, but about a strategic shift expected to endure over time.

For investors, this new reality creates interesting prospects.

What stocks to follow to invest in defense and security on the stock market?

The defense and security sector brings together very different players, ranging from traditional arms to cybersecurity, through space and surveillance technologies.

Here is a selection of the 10 European and American stocks to watch in 2026 to invest in the defense and security theme

Which ETFs to invest in the defense sector?

For investors who want broader diversification without picking individual stocks, thematic ETFs can be a good solution.

Here is a selection of 5 ETFs to follow in 2026 to invest in the defense sector

Artificial Intelligence and Quantum Computing: the ongoing technological revolution

Artificial intelligence and quantum computing are emerging as two major pillars of the ongoing technological transformation. After a phase of sometimes excessive enthusiasm, AI has entered a more concrete era, with its gradual integration into the real economy. Automation of processes, data analysis, industrial optimization, cybersecurity, and healthcare – use cases are multiplying and beginning to generate measurable productivity gains for companies.

In 2026, this rise in power should accelerate, driven by massive investments in digital infrastructure, semiconductors, and data centers. Quantum computing, still at an early stage, represents a longer-term but strategic disruption. It opens the door to unprecedented computing capabilities, capable of transforming key sectors such as pharmaceutical research, finance, logistics, or cryptography.

For the global economy, these technologies represent a major lever of competitiveness and sovereignty. Companies and states that master them will gain a decisive edge, while investors may see them as one of the strongest structural growth engines in the coming years.

Which stocks to watch to invest in AI and quantum computing on the stock market?

Companies positioned in artificial intelligence and quantum computing concentrate a large share of current technology investments and are set to play a key role in tomorrow’s economy.

Here is a selection of the 10 European and American stocks to watch in 2026 to invest in the AI and quantum computing theme

Which ETFs to invest in AI and quantum computing?

For investors who want exposure to AI and disruptive technologies without selecting each stock individually, thematic ETFs provide a simple and effective solution. They allow immediate diversification across the entire sector value chain while following major underlying trends. Here is a selection of ETFs dedicated to artificial intelligence to consider for 2026.

Here is a selection of 5 ETFs to follow in 2026 to invest in the AI sector

Strategic Resources and Critical Raw Materials: the Nerve of the Economic War

Strategic resources and critical raw materials have become a central topic that goes far beyond financial markets. Copper, lithium, uranium, and rare earths are now indispensable across many sectors, from defense to energy, including infrastructure, electrification, and new technologies. Without these raw materials, it would be impossible to produce military equipment, develop electrical grids, or fabricate the technologies that underpin tomorrow’s growth.

Throughout 2026, this dependence is likely to intensify. The energy transition, the rearmament of states, and industrial relocalization are driving a structural increase in demand, while supply remains constrained. Opening a mine takes time, is costly, and often faces environmental or political obstacles.

For investors, strategic resources represent a distinct theme. They offer direct exposure to major economic and geopolitical shifts today, while playing a key role in diversifying a long-term portfolio.

What stocks to follow to invest in strategic resources on the stock market?

The sector of strategic resources and critical raw materials includes many key players positioned at different points in the value chain, from extraction to processing.

Here is a selection of the 10 stocks to follow in 2026 to invest in strategic resources

Which ETFs to invest in critical raw materials?

For investors who want to go further in diversification, ETFs are a particularly suitable solution. They allow exposure either to companies active in strategic resources or directly to the raw materials themselves, without having to select a specific stock or metal.

Here is a selection of 5 ETFs to follow in 2026 to invest in critical raw materials

Public debt, rates, inflation: a new macroeconomic regime

The question of public debt, interest rates, and inflation has become a central element of the global economic landscape. After years of highly accommodative monetary policies, governments find themselves with historically high debt levels, while central banks must deal with inflation more persistent than before. Even if rates gradually decline, a return to the era of free money seems unlikely.

In 2026, this environment should continue to weigh on investment decisions. Rates persistently higher than before the pandemic are directly influencing asset valuations, the cost of credit, and the trade-offs between equities, bonds, and real assets. Inflation, even if better controlled, remains a parameter to account for in portfolio construction.

For investors, understanding this new macro regime is essential in order to adapt their strategy, preserve capital growth, and better manage long-term risks.

What stocks to follow to gain exposure to public debt and rates on the stock market?

The peculiarity of the public debt and rates theme is that it allows investors to gain exposure to two major complementary asset classes. On one side, equities, particularly banks and financials, which are directly sensitive to rate movements; on the other side, bonds.

Here is a selection of 10 assets to gain exposure to public debt and rates in 2026

Which ETFs to invest in debt and inflation?

For investors seeking broader exposure to the debt and rate theme, ETFs allow positioning on both bond markets and the financial sector, especially sensitive to rate movements, while benefiting from immediate geographic diversification.

Here is a selection of 5 ETFs to follow in 2026 to invest in debt and inflation

How to practically invest in these major 2026 themes?

To invest concretely in these major 2026 themes, the simplest approach is to combine direct stocks and ETFs, according to your budget and the time you want to devote.

For buying stocks, the best online brokers now make investing very accessible. Platforms such as eToro, XTB, IG or Trade Republic allow you to buy stocks at low prices or with no commissions on many international markets. The ability to invest via fractional shares is also a real advantage, as it allows you to spread your capital across several companies, even with a modest starting capital, and thus to better diversify your stock portfolio.

ETFs can also be purchased through the neo-brokers mentioned above, but they are also widely available with more traditional brokers such as Bourse Direct, Fortuneo, Interactive Brokers or Freedom24. These stock brokers provide broad access to European and international ETFs, enabling easy adjustment of your allocation to your risk profile, investment horizon, and the themes you want to prioritise in 2026.

Be careful to invest via one of the best eligible PEA accounts if the security qualifies, to take advantage of the tax benefits of this wrapper. Otherwise, pick one of the best stock accounts to benefit from reasonable trading fees, a wide range of assets and tools and services suited to your investor profile.

All of our information is, by nature, generic. It does not take into account your personal situation and in no way constitutes personalized investment recommendations for the execution of transactions and cannot be construed as investment advice, nor as any form of solicitation to buy or sell financial instruments. The reader is solely responsible for using the information provided, and Cafedelabourse.com cannot be held liable. Cafedelabourse.com cannot be held liable for any error, omission, or ill-advised investment.