The idea of "building an investment strategy" can seem daunting, something reserved for financial experts in three-piece suits. The reality is quite different! With a sound method and the right tools, defining a strategy that suits you is not only possible, but it's also the key to serenely achieving your financial goals.

This guide is here to walk you through it step-by-step. We will break down this process into clear and simple stages, showing you how every feature of Investminder has been designed to make your life easier, while also offering a depth of analysis useful to more experienced investors. Whether you're a complete beginner or a seasoned investor, follow the guide!

Step 1: Define Your Profile - The Essential Starting Point

Before you even pick a single asset, the fundamental first step is to know yourself as an investor. Explaining how to invest without knowing why you are investing is like hitting the road without a destination. Your entire strategy must flow from this profile.

Ask yourself three essential questions:

A. What are your Objectives?

What is motivating you to invest? Are you investing to prepare for retirement in 30 years? For a down payment on a house in 5 years? Or to grow savings that you don't need in the short term? The answer will determine the acceptable level of risk.

Examples of Objectives:

• Retirement: With a 20 to 30-year horizon, a 70–80% exposure to stocks can be justified. Historically, the U.S. market (S&P 500) has delivered an annualized return of 9 to 10% over the last century.
• Real Estate Purchase: For a 5-year goal, aim for less volatile products (investment-grade bonds, money market funds). As an example, a European bond ETF has had an average annual volatility of 3 to 4%, compared to 15 to 20% for stocks.
• Financial Independence: This ambitious goal requires a long-term strategy focused on creating passive income (dividends, interest) and capital growth. Consistency and discipline will be your watchwords.

B .What is your Time Horizon?

This is the length of time you plan to leave your money invested without touching it. The longer your horizon (more than 10 years), the more you can afford to absorb market volatility (like with stocks) to aim for higher returns. If your horizon is short (less than 5 years), capital preservation is the priority.

• A 20-year horizon allows you to accept a -30% drawdown (as seen in 2008), as the recovery time is less than 5 years. On a 3-year horizon, such a loss is unacceptable: the strategy must limit drawdowns to -5 / -10%.

C. What is your Risk Tolerance?

This is the psychological aspect. How would you react if your portfolio lost 20% of its value in one month? If this thought gives you sleepless nights, an aggressive strategy is not for you, even if you have a long time horizon.

Tolerance can be measured by the psychological acceptance of loss:

• A tolerant investor will withstand a -20% or -30% unrealized loss.
• A cautious investor will prefer a portfolio with an annual volatility below 8% or 10%.

Practical advice: Start cautiously. It's better to gradually increase your risk exposure than to start too aggressively and panic at the first market correction.

The rest of this guide must be read through the lens of this profile.

Step 2: Diversification

Once your profile is defined, the first principle of construction is diversification. You know the saying: "don't put all your eggs in one basket." In finance, it's exactly the same. The goal is to spread your investments so you don't depend on the performance of a single asset, a single country, or a single sector.

A. By Asset Class

There are several major families of investments, called "asset classes." The best known are stocks and bonds, but there are others like commodities or cryptocurrencies.

• Stocks: A stock is a share of a company's capital. Its main advantage is a high expected gain over the long term, with an expected long-term return of 6–8% after inflation, but it has experienced historical drawdowns of -55% (2008 crisis).
• ETFs (Exchange-Traded Funds): These are funds that replicate the performance of an index or a sector. Their huge advantage is instant diversification: by buying a single ETF, you invest in a "basket" of stocks. They also provide easy access to more technical markets like bonds, commodities, or emerging markets.

How Investminder helps: The application lets you choose between Stocks and ETFs. If you opt for ETFs, you can then specify the asset class you're interested in: Stock ETFs, Bond ETFs, Commodity ETFs (ETCs), Currency ETFs, or Cryptocurrency ETFs.

B. By Geographic Area

The economies of different countries or continents do not all grow at the same pace. A slowdown in Europe can be offset by strong growth in Asia. Investing in several geographic areas is therefore another essential layer of diversification.

How Investminder helps: In the application, you can select the areas that interest you. The choices include the entire world (perfect for maximum diversification with indices like the MSCI World), North America, Europe, Asia, and Latin America.

C. By Sectors & Industries

Finally, you can refine your diversification by choosing to invest in different business sectors (healthcare, technology, energy, etc.), as described by the GICS classification (11 major sectors). As with geographic areas, not all sectors perform in the same way at the same time. In times of uncertainty, favor defensive sectors (healthcare, consumer staples, utilities). In times of growth, focus on cyclical sectors (technology, finance, industrials).

Good to know: Currently, filtering by sector is not yet implemented in Investminder's strategy creation process.

Step 3: The Model – Which Approach to Manage Your Strategy?

Once your "playing fields" are defined, you need to choose a method for managing your investments day-to-day. Here are the two approaches available now on Investminder.com.

A. Rebalancing

Imagine you decide (based on your profile!) to have a portfolio of 60% stocks and 40% bonds. After an excellent year for stocks, their share might rise to 70%. Rebalancing consists of selling a portion of your stocks to buy bonds, thereby returning to your target allocation of 60/40. The goal is to always maintain the level of risk you initially chose.

B. DCA ("Dollar Cost Averaging") and Averaging Down/Up

Trying to predict the best time to buy or sell ("market timing") is extremely difficult. DCA is a simple and effective method to overcome this problem. It consists of investing a fixed amount at regular intervals (in a "DCA" style), regardless of market movements. By doing this, you smooth out your average purchase price over the long term. It's an excellent approach to get started and to invest with discipline.

But there is a powerful and flexible variant: averaging in tiers. Rather than investing at fixed intervals, you buy or sell when an asset's price varies by a certain percentage (for example, buying after every 5% or 10% drop, or selling after every 5% or 10% rise). This approach is gradual and less stressful, as it allows you to take advantage of natural market movements without trying to predict the unpredictable. For instance, if an ETF drops by 10%, you buy a tranche; if it drops another 10%, you buy another tranche. This reduces the risk of investing a large amount at the wrong time while capitalizing on low price opportunities. For selling, the idea is similar: selling in tiers on the way up secures gains without waiting for a hypothetical peak.

Step 4: The Rules for buying and selling

Now, let's get concrete: at what exact moment do you take action?

A. Regularly

This is the simplest approach, perfectly aligned with DCA or rebalancing. You decide on a frequency (monthly, quarterly...) and stick to it, which removes the emotional aspect from decision-making.

• Recommended frequencies:
• Quarterly: For volatile portfolios.
• Semi-annually: A good compromise for most.
• Annually: Sufficient for long-term strategies.

B. Assisted "Market Timing"

Even though predicting the markets perfectly is impossible, every investor seeks to identify favorable times and situations for buying or selling.

• How Investminder helps: The application offers clear rules to assist you. For example, you can choose:
• To buy an asset after a significant drop.
• To buy when a downward trend reverses and starts to rise.
• To sell after a strong rise to take profits.
• To sell when an upward trend reverses and starts to fall.

Warning: Perfect market timing is impossible. Instead, aim to avoid major mistakes (buying at the peak of euphoria, selling at the bottom of a panic).

C. The Stop-Loss: Your Safety Net

Investing involves two types of selling: one to take a gain, and one to limit a loss. The "stop-loss" handles the second case. It is a fundamental risk management tool that helps you answer the question: "How much am I willing to lose on this position without it affecting my sleep?"

Example: A stock bought at €100 drops to €90, and you had placed a stop-loss at -10% → you receive a sell notification. This disciplines the investor and preserves capital for future opportunities.

Step 5: Asset Selection

The choice of the assets themselves is obviously crucial. Here are two criteria to keep in mind.

A. Long-Term Performing Assets

For a long-term strategy, it is essential to choose assets that have a positive underlying trend. A solid company, a global index, or a growing sector are good candidates.

• MSCI World: 7.6% annualized return over 50 years.
• US 10-Year Treasury Bonds: 4.8% annualized return since 1970.
• Fundamental criteria:
• Uptrend over at least 5-10 years.
• Drawdown acceptable in relation to your risk tolerance.
• Sufficient liquidity (avoid illiquid, exotic assets).

B. Decorrelated Assets

Decorrelation is a powerful concept. It means avoiding having all your assets move in the same way at the same time. If all your assets are perfectly correlated, during a sharp downturn, your entire portfolio will fall together, nullifying the benefits of diversification.

How Investminder helps: No need to be a statistics expert! During asset selection and in the backtest results, Investminder provides you with correlation matrices to help you easily visualize whether your choices are well-diversified or not.

Step 6: Validate Your Strategy with Backtests

Once your strategy is defined on paper, how do you know if it's sound? This is where the magic of backtesting comes in. A backtest consists of applying your strategy to past data to see how it would have performed.

A. Test Across Different Periods

It is crucial to test your strategy over several periods to see how it reacts to different market conditions (financial crisis, tech bubble, stagnation...).

• How Investminder helps: The application allows you to run your backtests over several rolling periods (e.g., the last 3, 5, or 10 years) or to define the start and end dates yourself.
• Best Practices:
• Test over at least 10 years to capture different cycles.
• Include at least one major crisis (2008, 2020).
• Test with several different start dates (for robustness).
• Beware of "overfitting": a strategy that is too optimized for the past may disappoint in the future.
• Specific Periods: To test particular conditions:
• 2007-2009: Financial Crisis
• 2010-2019: Prolonged Bull Market
• 2020-2021: COVID and Rebound
• 2022-2023: Inflation and Rate Hikes

B. The Limits of Backtesting: An Essential Warning

A backtest is an exceptional tool, but it is not a crystal ball. It is fundamental to keep in mind the golden rule of investing: "past performance is not indicative of future results."

A backtest shows what would have worked in a specific historical context (for example, a long bull market). It does not guarantee that the strategy will work in tomorrow's market conditions. Also, beware of "over-optimization": by testing and tweaking repeatedly, you can create a strategy that is perfect for the past but has become too complex and fragile for the future.

The backtest should therefore be used as a tool for building confidence and for elimination (it is especially useful for ruling out strategies that would have performed poorly), not as a promise of future gains.

C. Adjust and Re-test

It's rare for the first version of a strategy to be perfect. A backtest can reveal weaknesses or simply make you curious about the impact of a parameter (changing an asset, adjusting a purchase rule...).

• How Investminder helps: The platform is designed for iteration. You can go back to any step, modify a parameter, and run a new backtest. Then you just need to compare the results to choose the configuration that suits you best.
• Example of allocation adjustment: A portfolio changing from 60% stocks / 40% bonds to 70% / 30% might increase the average performance by 0.5%/year, but it also raises volatility by +3 points and the drawdown by 10 points. This risk/return trade-off is at the heart of strategic decision-making.
• Improvement Process:

1. Identify weak points.
2. Modify ONE parameter at a time.
3. Retest and compare.
4. Repeat until satisfied.

Step 7: Implementation – From Strategy to Active Portfolio

Congratulations, your strategy is now defined and validated! It's time to link it to your portfolio to make it operational.

• How Investminder helps: Once the strategy is validated, the application handles the monitoring for you.
• Strategy Alerts: Investminder will send you an alert as soon as a buy or sell signal from your strategy is triggered, explaining why.
• Portfolio Alerts: Once the strategy is linked to a real portfolio, the alerts become even more precise. They will tell you not only WHICH asset to buy or sell, but also WHAT QUANTITY, taking into account your available cash and the securities you already hold.
• The Investminder Advantage: No more need for calculations; the application does the work for you. You receive clear, actionable instructions.

Conclusion

Building an investment strategy is not an insurmountable mountain. It is a logical journey that starts with you (your profile), is built on a solid foundation (diversification), is defined by clear rules, is validated by rigorous testing, and is then applied with discipline.

By following these steps, you put the odds in your favor. And with a tool like Investminder, each step is simplified to allow you to focus on what's essential: your goals. We believe that building an investment strategy is not an exercise in prediction, but one of probabilistic risk management.

Final piece of advice: Don't seek perfection. A "good enough" strategy applied with discipline will always beat a "perfect" strategy that you never apply. Get started, test, learn, and adjust. It's by investing that you become an investor!

Updated on: 02/03/2026