Founding article: Why do we invest differently?
The thesis that underpins our long-term wealth management approach
Well-managed clients.
And yet disappointed.
What is lost between the reported return and the actual wealth?
We sought a rigorous answer to this question. And we found it—not in classical financial literature, but in physics. Starting with an old intuition, formulated in 1927 by Werner Heisenberg.
Heisenberg's uncertainty principle states that it is impossible to simultaneously and precisely know the position and velocity of a particle. The more one tries to fix one, the more uncertain the other becomes. And above all: the very act of observing distorts what is being observed. Measurement is never neutral.
Applied to financial markets, this principle has immediate resonance: one cannot simultaneously know the exact price of an asset and its future trajectory. Every investment decision is made in a state of fundamental uncertainty—not due to a lack of information, but by its very nature. Uncertainty is not a flaw in the system; it is a constitutive property.
If uncertainty is irreducible, the question is no longer how to eliminate it. It is how to build a wealth architecture that takes advantage of it rather than being subjected to it.
This intuition led us to the work of Ole Peters, a physicist at the Santa Fe Institute, who published a mathematical proof in Nature Physics in 2019 that is a logical continuation of this idea. His thesis: classical finance calculates the wrong average. It reasons as if an investor could experience thousands of trajectories in parallel and average them. But a real human being experiences only one trajectory, over time, one after the other. Uncertainty is not an anomaly to be corrected—it is the very condition under which real wealth accumulates, or is lost.
The illusion of average yield
-25%
An investment that gains 50 in the first year and then loses 50 in the second has an average return of 0. Your actual capital, however, has lost 25. Volatility destroys wealth—silently, mechanically, even when averages appear neutral.
This phenomenon has a name: volatility drag. It is structurally ignored by traditional portfolio management, which continues to optimize expected returns rather than the actual growth of capital over time. Heisenberg raised the issue. Peters provided the quantitative demonstration. We have drawn the practical conclusions.
The enemy of your wealth,
That's not the risk.
It's volatility that's been poorly managed.
A mathematical framework
built to respond to this reality
Based on this thesis, we have constructed an allocation method
based on three tools from applied mathematics and the
Information theory:
Why assurance-vie Is Luxembourg the obvious answer?
A dynamic rebalancing strategy can only function fully if each adjustment is tax-neutral. In France, choosing between two investment vehicles generates a taxable event—which amounts to taxing the very discipline that produces performance.
L''Luxembourg assurance-vie This solves the problem structurally: transfers between investment units are made without immediate taxation. The strategy can be executed with all the necessary rigor, without tax friction, over a horizon of twenty years or more.
In addition, there is the protection of the Luxembourg Security Triangle, the possibility of accessing institutional support via dedicated funds, and the international portability of the contract — a decisive advantage for clients whose life project includes geographical mobility.
Profile
Defensive
Capital preservation. Steady growth, controlled volatility. Horizon of less than ten years or succession constraints.
Profile
Moderate
The mathematically optimal balance between growth and stability. The reference profile over ten to twenty years.
Profile
Offensive
Maximizing wealth growth. For clients with a long-term investment horizon and a strong ability to weather economic cycles.
ALTA When artificial intelligence serves mathematical rigor
Calibrating an allocation based on these principles for each client—taking into account their existing assets, investment horizon, tax situation, and life goals—represents a considerable calculation complexity. We developed ALTA to address this.
ALTA is our AI-powered wealth analysis tool. It models your overall situation, simulates the evolution of your assets under different market and life scenarios, and calibrates your allocation with a precision unattainable by manual methods. Balmont Conseil is the first wealth management firm in France to integrate this level of analysis into its daily practice.
Your wealth deserves
a strategy built for your reality
Alexis Sagnier
With over 17 years of expertise in financial engineering, Alexis Sagnier assists executives and expatriates in securing their cross-border challenges.
Why we invest differently
The thesis that underpins our long-term wealth management approach
