Portfolio diversificationHow to diversify your portfolio correctly in 2026

Time to read9 min.

updated at06/10/2026

CategoryFundamentals of investing

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The most important facts at a glance

Through portfolio diversification, investors take advantage of the opportunity to include a wide range of investment forms and investments in their portfolio with the aim of minimising investment risks.
A distinction is made between different diversification strategies, for example by asset class, industry or region.
The combination of different strategies helps to hedge the portfolio against certain individual risks, for example in the event of negative market or stock market developments.
Possible disadvantages of diversification are the risk of over-diversification or rising management costs as more investments are included in the portfolio.
The earlier you start to diversify your portfolio and adapt it to your personal preferences, the more effective it will be in terms of your investment strategy.

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Some investors will be familiar with this scenario: You invest in shares of a promising company for years, your investment performs well - until the company goes into crisis and your profits suddenly become losses. This means that a successful investment can turn out to be an expensive failure within a very short period of time.

To prevent such scenarios, many investors take advantage of the concept of diversification and thus ensure greater risk diversification in their portfolio in order to be able to offset possible negative performance in good time. But diversification also has its pitfalls. That’s why this article is about how to successfully diversify your portfolio and prepare it for the future.

What is diversification?

Diversification is about allocating investment capital to several different assets rather than just one. You can diversify via asset classes, for example, by investing in equities, bonds and tangible assets, but you can also have thematic (via sectors) or geographical (via markets) diversification.

Within these categories, too, you can diversify your portfolio even further by dividing your capital into different forms of investment: If you want to invest in equities, for example, you have access to individual shares as well as a wide range of equity funds or equity indices through which you can spread your assets.

The idea behind diversification is to invest in a wide range of assets in order to balance the investment risks and thus protect your assets. This allows the strengths and weaknesses of the individual investments to balance each other out. Similar to a football team consisting not only of strikers, but also of goalkeepers, defenders and the middle field, the individual investments in a diversified portfolio ensure a good balance and counteract risks in a targeted manner.

You should diversify, especially if you want to invest larger amounts such as 20,000 euros or how to invest 50,000 euros. Then you will achieve a more balanced risk/return ratio by dividing your assets into different investments than if you invest all your capital in a single investment. However, even with smaller investment amounts, it is worth dividing up your capital to reduce the individual investment risks and ensure a better balance in your portfolio.

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Diversification in the portfolio: The Basics

Systematic vs. unsystematic risk

In order to be able to build a diversified portfolio, it is crucial to distinguish between systematic and non-systematic risk.

Systematic risks, also known as market or beta risks, are risks that affect the entire market or segment - and therefore cannot be remedied by diversification of your portfolio. Possible systematic risks include, for example, global crises, geopolitical events or changes in interest rates with international impact.

Systematic risks cannot therefore be avoided as such. Possible handling strategies include hedging - or increasing one’s own risk tolerance.

Unsystematic risks, on the other hand, affect individual companies or industries. Such risks may arise, for example, from certain industry trends, labour law disputes or the way the company is managed.

Diversification of your portfolio across different companies, asset classes and/or sectors allows you to minimise or even balance out unsystematic risks.

Correlation and diversification in the portfolio

Correlation can be used to show how two investments behave in relation to each other. A value of +1 represents a perfect positive correlation: If one asset rises, the other rises as well. A value of -1 shows a perfectly negative correlation: If one asset rises, the other falls accordingly. The calculation of the correlation therefore reveals useful correlations that can help you diversify your portfolio.

Consequently, a high positive correlation offers only minor diversification benefits for your portfolio. This is because the probability that both assets will rise or fall at a similar pace is particularly high. Therefore, in the event of a downward movement in the market, none of the investments offers the opportunity to absorb and mitigate the negative development of the others.

A low or negative correlation, on the other hand, is very beneficial for a diversified portfolio. Should one of your investments go down, you can expect a correspondingly positive performance for the negatively correlated investments - and vice versa.

In any case, your investments do not all follow the same dynamics, but react to different risk factors. By diversifying your portfolio according to its correlation, you ensure useful and effective risk diversification.

Further fundamentals of portfolio diversification

In addition to the different types of investment risks and the concept of correlation, there are other fundamentals that can help you achieve successful portfolio diversification:

The rebalancing process helps you to regularly review your portfolio and ensure that it continues to meet your investment objectives and your personal situation. After all, certain factors can change over time, such as your family situation or income. In such cases, a revaluation of your portfolio can certainly pay off.

This also includes adapting your portfolio to your time horizon, if necessary. Depending on your personal investment horizon, different types of investments may be suitable:

If you are even younger and have a long-term investment horizon, you tend to be able to take greater risks and invest in growth-oriented equities, for example.
The shorter your horizon, for example if you retire in the next few years, the more suitable security-oriented investments such as bonds are.

Risk tolerance also plays an important role in portfolio diversification. This is higher or lower depending on the investor or investment experience. Be honest with yourself here - only then can you create a diversified portfolio that works successfully for you in the long term and meets your personal needs.

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Portfolio diversification: Overview of the most common strategies

Diversification by asset class

In this form of diversification, the assets are invested in different asset classes such as real estate, commodities or equities in order to balance the risks of the individual asset classes. This way, your entire investment does not crash suddenly should it develop negatively in one of the asset classes at times. One example of this was the start of the Ukraine war, when many stock markets recorded high short-term losses, but other asset classes, such as commodities, gained in value.

Overview of the most common asset classes:

Equities: By buying a share, you acquire a share of a publicly traded company. In addition to individual securities, you can also invest in equity funds, whose fund portfolio is usually composed of many different individual shares.

Equities belong to a higher risk class and therefore usually have a comparatively high investment risk, but also offer investors correspondingly greater return opportunities.
Bonds: Bonds are fixed-income securities. A distinction is made between corporate and government bonds, which are issued by the respective institutions in order to raise capital. As an investor, you will receive back your invested capital at a fixed interest rate after the term.

The bonds are linked to different credit ratings depending on the company or state. In principle, however, bonds are a comparatively easy-to-plan investment that is particularly worthwhile for security-oriented investors.
Properties: Buying a home is considered one of the most classic investments in the real estate asset class. However, this involves a lot of equity and a large risk of clustering. Alternatively, as an investor, you can also invest in other forms of real estate investment, for example in open-ended real estate funds, which are allocated to alternative investment funds. As with all investment funds, you benefit from a broader diversification across several assets.

Real estate is considered to be a crisis-proof investment, as it acts as a tangible asset independently of the stock market and is therefore subject to less fluctuations in value.
Raw materials: Commodities are a comparatively diverse asset class. These include precious metals such as gold, silver or platinum, but also coal, oil or agricultural commodities such as grain or coffee.

Commodities are subject to various risk factors: Agricultural commodities, for example, are heavily influenced by the weather, while the value of energy commodities depends heavily on global economic developments, as the Ukraine war has also shown. Commodities are therefore best suited as an addition to a diversified portfolio.
Renewable energy sources: With an investment in the renewable energy asset class, you invest in tangible assets such as wind power or solar power plants. Like other tangible assets (e.g. real estate or commodities), renewable energy investments are largely independent of the stock market and are therefore associated with lower fluctuations in value. Thanks to the increasing demand for renewable energy generation investments, the asset class offers great growth potential.

Those who do not want to invest in individual wind turbines or solar farms have the opportunity to invest their capital in several assets at once with renewable energy funds such as klimaVest. With klimaVest, you are investing in over 43 tangible assets at the same time, which are also geographically dispersed with locations in 6 (excluding Luxembourg) European countries. In the broader tangible asset segment, this also includes infrastructure funds such as the ELTIF infraVest, which invest in transport, energy or digital infrastructure and thus offer another opportunity to diversify with tangible assets.
Alternative asset classes: This category includes many forms of financial investments that are more specific assets, such as cryptocurrencies or valuables with a particular collective value. Investors who wish to invest in such asset classes - for example, in the case of collectibles such as works of art or jewellery - usually move in small markets and require corresponding expertise.

Although alternative asset classes such as cryptocurrencies are becoming increasingly popular, they are often subject to strong fluctuations in value, which means high investment risks for investors.

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Eight building blocks of asset allocation

Account balance
Savings deposits
Bonds
Stocks
Real Estate
Portfolio Fund
Renewable Energy
Private Equity

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Diversification by industry

With sector-specific diversification of the portfolio, you allocate your assets to various investments in different sectors. Depending on the industry, different types of investments are also possible here, for example equity or tangible investments. The fact that diversification by sector can be worthwhile has been demonstrated during the coronavirus crisis, for example: While many companies in the catering and hospitality sectors suffered major losses, the healthcare and pharmaceutical sectors made significant gains.

An overview of some industries:

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Healthcare
The healthcare industry includes, for example, companies in the area of dietary supplements or pharmaceuticals, as well as clinics and hospitals. In this sector, you can invest, in particular, through individual shares or equity funds in larger, exchange-traded pharmaceutical or clinical groups that are traded on the stock exchange.
Motor Vehicles
The automotive industry remains one of the most important industries in the industrial sector. With the increasing popularity of electric motors, there is a noticeable change taking place within the industry, with new manufacturers entering the market alongside Audi, Ford & Co., and competition is increasing. This creates good investment opportunities for investors, which can bring solid returns with a sufficiently broad spread.
Technology
Advances in digitization provide a previously unknown range of available technologies. These include large corporations such as Meta, Microsoft and Apple, as well as emerging companies that develop new generations of powerful computer chips, for example. With the expansion of artificial intelligence and artificial reality, there are still a few breakthroughs to be expected in this industry.
Financial matters
Classic sectors such as the financial sector have also earned their place in a sector-diversified portfolio. The development of the financial sector is closely linked to the development of the (world) economy, so that the sector often proves to be very stable. And here too, new trends are constantly emerging, such as fintech companies that integrate modern technologies into financial processes and thus introduce new financial products into the industry.
Energy
Especially against the backdrop of the energy crisis, the energy sector has once again gained in importance. The expansion of renewable energies gives hope that the energy supply can operate more independently of international energy supplies from fossil raw materials in the future. With an investment in companies or tangible assets from the renewable energies sector, this sector can be strengthened and further expanded in a targeted manner - and generate solid return opportunities for investors.

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Diversification by investment period

With diversification by investment period, you can allocate your investment capital to different investments with different maturities. This means that the various investments end at different times and you can reinvest the capital generated at different times. For example, if all your investments end up in an unfavourable market phase at the same time, you can only reinvest your capital under significantly worse investment conditions. In addition, diversification by investment period helps you to preserve your liquidity.

Overview of the most common investment periods:

Short-term investment period (1-3 years): Short-term investments with a maximum term of three years are either particularly security-oriented investments with a low expected return or high-risk investments with high potential returns.
In the first case, it is usually investment forms such as money market funds or overnight money accounts that allow rather inexperienced investors to gain an initial insight into the financial market without having to take major risks. The latter may be trading investments such as shares that are only held short and sold again.
Medium-term investment period (3-10 years): During this period, investors have the opportunity to achieve a balance of risk and return. Medium-term investments are suitable for investors who are willing to take a moderate investment risk and potentially achieve higher returns in return. Possible investments in this range are corporate bonds, mixed funds with high returns or real estate funds.
Long-term investment period (10+ years): Investments with a long term of at least 10 years have the benefit that many investment risks - such as market-related fluctuations in value - can be offset over the long term. If you as an investor have a long-term investment horizon and are willing to give up your capital for 10 years or more, you have the chance of making solid profits. Equity and index funds or real estate investments can be particularly worthwhile here.

Diversification by style

In addition to the usual types of diversification, you can also diversify your portfolio by style. The decisive factor here is the investment style to which the individual investments can be assigned. By combining different investment styles, you have the opportunity to balance the risk and return ratios of the individual styles and to skillfully diversify your portfolio.

Overview of different investment styles:

Growth equities: These investments are equities of companies that are expected to grow above average. Growth stock prices are often higher, but there are also greater opportunities for returns.
Value shares: The focus here is on companies that appear to be undervalued on the market. For such investments, experts assume that their actual value is above the current market value, so that the unit prices here are usually comparatively low. The price/earnings ratio for such investments is usually low and therefore offers investors a price benefit. In addition, stable dividends are usually awaiting here.
Large Cap: Behind this name are large companies or groups with a market capitalisation of several billion dollars. The development of such established companies is usually quite stable and less volatile than that of smaller companies.
Small Cap: Although such smaller companies with a correspondingly lower market capitalisation are considered to be more risky, they offer all the greater return opportunities in the event of a positive development.

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klimaVest: Highly diversified in just one investment

Diversifying your investment portfolio, buidling a good risk/return ratio, is important, but it also takes a lot of time and energy.

For investment funds such as the ELTIF klimaVest from the Commerz Real Group, diversification has been integrated into the investment product right from the start. The fund thus offers broad risk diversification with just one investment.

With over 43 assets from the renewable energy sector in 6 (excluding Luxembourg) European countries, klimaVest is broadly diversified not only by number of assets, but also by region and type of tangible assets. This ensures the greatest possible diversification in the fund portfolio in terms of market dynamics, weather conditions and the technologies used.

From wind turbines in Finland to the solar park in southern Spain: klimaVest offers future-proof diversification for your future-proof portfolio buidling.

Find out more about klimaVest

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The advantages and disadvantages of portfolio diversification

Benefits of a diversified portfolio

Risk diversification: The main objective of portfolio diversification is to reduce unsystematic risks in your portfolio. Investments in many different investments and forms of investment ensure that the cumulative risk is reduced by well-performing investments offsetting the negative developments of other investments.
Higher return potential: By allocating your capital to different asset classes or sectors, you can benefit from positive market developments and earn greater profits, even if other market segments are weakening.
Protection against fluctuations: A broadly diversified portfolio helps you to cushion and offset the impact of more volatile market segments. If an asset class fluctuates strongly, this can even mean growth potential for other segments.
Versatility: The market is constantly changing. A portfolio that is diversified both in terms of content and maturity gives you the opportunity to reallocate capital to more promising sectors should the performance of an investment or segment develop negatively in the long term.
Access to more opportunities: The more different investments from different sectors, regions or asset classes you include in your portfolio, the more investment opportunities you have.

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Disadvantages of a diversified portfolio

Over-diversification: As well as the diversification of your capital across various investments sounds, some investors think it’s too good and therefore take the risk of over-diversification. As a result, the potential returns of your individual investments can dilute and profits disappear behind the poor performance of other investments.
Higher costs: The more investments you include in your portfolio, the more management and transaction costs you have to pay. Especially for actively managed funds, fund management fees may be higher. You should therefore keep a good balance here so that you do not have to give up all your profits to manage your investments.
Difficulty: A highly diversified portfolio also loses clarity. Keeping an overview of all investments and all important parameters of the custody account can therefore be difficult and time-consuming. Therefore, it is particularly advisable for less experienced investors to diversify the portfolio as carefully as possible at the beginning in order to achieve the greatest possible diversification with relatively few investments.
Lack of focus: Investing in segments with which you are personally familiar proves to be a good investment decision for many investors. Personal background knowledge helps you to feel safe with your investment and to stand by it in the long term. However, if the focus is on the widest possible diversification, investments from areas and segments that you are unfamiliar with as an investor may also end up in the portfolio. There is then a risk of not having full confidence in the investment and withdrawing the capital early, which is usually associated with higher costs.

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Practical tips for portfolio diversification

Start portfolio diversification early: The sooner you start dividing your capital into different investments, the more you will get out of each investment. In the case of interest rates, for example, time plays an important role, as your profit increases the longer your investment lasts. And even if a market segment develops negatively, such fluctuations usually compensate over time. So it’s worth getting started early.
Keep up to date regularly: Before deciding on a new form of investment, you should familiarise yourself with the fundamental opportunities and risks of the form of investment. This prevents you from withdrawing your capital from your investment early and making losses. And even if your portfolio is well positioned, it is worth staying on top of finances to be able to identify trends early and adapt your portfolio to current market conditions. From financial news and reports to books, seminars and online courses, there are numerous sources available.
Take advantage of the diversity of investments: Allocation to low or negatively correlated investment forms brings you real benefits in terms of risk/return ratio. Therefore, don't just invest in equities and ETFs, but also consider alternative asset classes such as real estate or tangible assets from the renewable energy sector. Numerous investment opportunities await you here. Anyone who wants to invest in funds in a targeted manner already spreads their capital across many individual securities within a single product.
Avoid emotional decisions: Especially if you are not familiar with a particular segment or investment form, even small fluctuations can lead to great uncertainty and impulsive decisions. But before you let your emotions determine your actions, focus on your overall investment strategy and the potential of your entire portfolio.
Check your portfolio regularly: Regular rebalancing helps you check whether your investment portfolio buidling is still optimal and meets your investment objectives. For example, if you notice after a year that certain investments have grown strongly, it is worth considering selling your investment and investing the capital elsewhere. However, as soon as your personal circumstances change, it also makes sense to adapt your portfolio to your preferences in the long term.

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Frequently asked questions about portfolio diversification

Portfolio diversification is a way to divide your investment capital into several types of investments. This allows you to take advantage of different investment opportunities at once and benefit from higher return expectations, while the individual investment risks are partially absorbed and offset against each other.

Invest in investment forms that you are familiar with and that correspond to your personal preferences for diversification. In principle, diversification is possible across asset classes, sectors, investment period and region, among other things. However, avoid over-diversifying your portfolio.

The main purpose of diversification of the investment portfolio buidling investment risks. By allocating your capital to different investments that follow different market dynamics, you can balance the investment risks and provide greater return opportunities.

The most common is the diversification of the investment portfolio, buidling across asset classes, sectors, regions or investment periods. This allows you to select investment forms that follow different market and economic dynamics, are located in different regions and have different maturities. This allows you to diversify your portfolio in a variety of ways.

Portfolio diversificationHow to diversify your portfolio correctly in 2026

Contents

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The most important facts at a glance

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What is diversification?

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Diversification in the portfolio: The Basics

Systematic vs. unsystematic risk

Correlation and diversification in the portfolio

Further fundamentals of portfolio diversification

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Portfolio diversification: Overview of the most common strategies

Diversification by asset class

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Eight building blocks of asset allocation

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Diversification by industry

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Diversification by investment period

Diversification by style

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klimaVest: Highly diversified in just one investment

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The advantages and disadvantages of portfolio diversification

Benefits of a diversified portfolio

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Disadvantages of a diversified portfolio

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Practical tips for portfolio diversification

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Conclusion: Portfolio diversification made easy

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Frequently asked questions about portfolio diversification

What is portfolio diversification?

How should you diversify your portfolio?

What does diversification bring?

What portfolio diversification strategies are there?

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Contents

The most important facts at a glance

What is diversification?

Diversification in the portfolio: The Basics

Systematic vs. unsystematic risk

Correlation and diversification in the portfolio

Further fundamentals of portfolio diversification

Portfolio diversification: Overview of the most common strategies

Diversification by asset class

Eight building blocks of asset allocation

Diversification by industry

Diversification by investment period

Diversification by style

klimaVest: Highly diversified in just one investment

Benefits of a diversified portfolio

Disadvantages of a diversified portfolio

Practical tips for portfolio diversification

Conclusion: Portfolio diversification made easy

Frequently asked questions about portfolio diversification

What is portfolio diversification?

How should you diversify your portfolio?

What does diversification bring?

What portfolio diversification strategies are there?

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