Civil Law and Wealth Management Portfolio Loss Litigation in Europe

1. Introduction

Wealth-management portfolio loss litigation concerns civil claims brought by an investor, private client, family office, pension vehicle, company, trust, or other asset owner against a bank, investment adviser, discretionary portfolio manager, broker, fund manager, or other financial intermediary after the managed portfolio suffers losses.

Europe does not have one unified civil-law code for wealth management. Liability is generally determined through a combination of:

national contract law;

professional negligence/delict principles;

fiduciary or loyalty duties;

financial-services legislation;

MiFID/MiFID II conduct-of-business rules;

suitability and appropriateness requirements;

duties concerning conflicts and remuneration;

investment-management mandates;

prospectus and disclosure rules;

causation and loss rules; and

national procedural and limitation rules.

A crucial distinction is between ordinary investment loss and legally compensable loss. A portfolio manager does not normally guarantee that investments will make money. The investor generally must establish a breach of contractual, statutory, fiduciary, or professional duties and then prove that the breach caused the recoverable loss.

The European case law demonstrates this distinction particularly well.

2. Main Forms of Wealth-Management Portfolio Loss

Portfolio-loss litigation can arise from several different failures.

A. Unsuitable investment strategy

The manager may have been instructed to pursue:

conservative investment;

capital preservation;

balanced growth;

income generation; or

a specified risk level,

but nevertheless placed a substantial part of the portfolio into high-risk investments.

This is one of the strongest categories of civil liability.

B. Excessive concentration

A manager may place too much of the portfolio into:

one security;

one issuer;

one sector;

one country;

one currency;

one fund;

hedge funds;

private equity; or

illiquid assets.

Diversification is particularly important where the contractual mandate or client's risk profile requires it.

C. Failure to follow the investment mandate

A discretionary manager normally has authority only within the boundaries of the mandate.

For example, a mandate may prohibit:

speculative securities;

derivatives;

leveraged investments;

emerging-market exposure;

concentrated positions; or

investments exceeding a particular percentage.

A breach can create contractual liability even though the investment itself was not inherently unlawful.

D. Failure to investigate the client

A wealth manager may need to establish:

financial circumstances;

investment objectives;

risk tolerance;

investment experience;

knowledge;

liquidity requirements; and

time horizon.

This becomes particularly important under European financial-services regulation.

E. Failure to disclose material risks

Claims can arise where the manager fails to disclose:

leverage;

liquidity restrictions;

capital-loss risks;

conflicts of interest;

commissions;

embedded costs;

related-party relationships;

derivative exposure;

fund structure; or

limitations on valuation.

F. Improper retention of losing investments

A manager may be liable if securities are retained after circumstances make continued retention inconsistent with the mandate.

However, a falling price alone does not establish negligence. The court normally examines what a reasonable professional manager should have done at the relevant time.

G. Misrepresentation or fraud

More serious claims may involve:

fabricated performance figures;

fraudulent statements;

concealed conflicts;

unauthorized transactions;

false statements concerning investment safety; or

diversion of client assets.

3. Important European Case Laws

Case 1 — BGH, XI ZR 423/06, Germany, 23 October 2007

Bundesgerichtshof (German Federal Court of Justice), XI ZR 423/06

This is one of the most directly relevant German authorities concerning discretionary portfolio management.

The dispute concerned alleged breaches of duties arising from a Vermögensverwaltungsvertrag, or asset-management agreement. The allegations included the manager's failure to react appropriately to falling securities values, questions concerning stop-loss mechanisms, and the duty to inform the client when significant deterioration occurred in the overall portfolio.

The Federal Court considered the legal nature of the portfolio-management relationship and the obligations of the manager. (Anwalt24)

Legal significance

The case illustrates that portfolio management is not merely a series of isolated purchase-and-sale transactions. The manager has continuing obligations arising from the management mandate.

The relevant question is therefore not simply:

“Did the security lose money?”

Instead, the court examines whether the manager complied with the duties imposed by the management relationship.

Importance for litigation

An investor alleging liability should therefore identify:

the investment mandate;

the manager's continuing obligations;

the relevant market circumstances;

what the manager knew or should have known;

what action was reasonably required; and

how the omission caused additional loss.

The case is especially useful in disputes involving portfolio monitoring and failure to respond to deterioration.

4. Case 2 — Rechtbank Amsterdam, ECLI:NL:RBAMS:2011:BV0422, Netherlands, 21 December 2011

Amsterdam District Court — Wealth Management Partners N.V.

This is one of the clearest European civil cases involving excessive risk in a managed portfolio.

The client had entrusted approximately €920,977 to a wealth manager. The agreed investment policy was risk-averse and intended to protect capital.

Instead, the manager invested more than 80% of the portfolio in hedge funds.

The portfolio subsequently suffered substantial losses.

The court concluded that the hedge-fund investments were inconsistent with the agreed risk profile and that the manager had failed to act as a reasonably competent professional asset manager. (Rechtspraak)

Particularly important aspect: causation

The court did not simply award damages because the portfolio fell.

It compared:

Actual portfolio

with

Hypothetical portfolio that would have existed if the agreed investment strategy had been followed.

The court therefore used a counterfactual/reference portfolio methodology.

The loss was calculated by comparing the actual result with the result that would have been obtained through compliant management. (Rechtspraak)

Legal principle

This provides an important model for European portfolio-loss litigation:

Recoverable loss may be the difference between the actual portfolio and the portfolio that should have existed under the agreed investment mandate.

This is particularly useful in claims involving:

excessive risk;

unsuitable hedge funds;

concentration;

failure to diversify;

breach of investment restrictions.

5. Case 3 — Swiss Federal Supreme Court, 4A_72/2020, 23 October 2020

Swiss Federal Supreme Court, First Civil Law Division

This case is especially important because it directly concerns:

a wealth-management contract;

risk profile;

investment strategy;

damages; and

proof of portfolio loss.

The Federal Supreme Court explained that the wealth manager must investigate matters such as the client's:

financial circumstances;

investment objectives;

willingness to assume risk;

knowledge; and

investment experience. (Bundesgericht)

Positive interest

A particularly important part of the judgment concerns the calculation of damages.

The court explained that, in a properly established breach of a wealth-management mandate, the starting point is generally the client's positive contractual interest—the financial position the client would have occupied if the management contract had been properly performed. (Federal Supreme Court of Switzerland)

Where the problem concerns the management of the entire portfolio, the court can compare:

Actual portfolio

against

Hypothetical properly managed portfolio.

Why this matters

This prevents an investor from automatically claiming every decline in market value.

For example:

actual portfolio: €6 million;

properly managed hypothetical portfolio: €7 million;

market-wide decline: already incorporated into both;

manager-specific loss: €1 million.

The potential claim therefore concerns the incremental loss attributable to improper management, rather than the entire market decline.

6. Case 4 — Geneva Court of Justice, ACJC/1794/2019, Switzerland, 3 December 2019

The Geneva civil chamber considered a wealth-management dispute involving alleged losses from investments, including hedge-fund exposure.

The court examined the agreed investment strategy and whether the manager's conduct actually exceeded the authority and risk parameters contained in the mandate.

Importantly, the court emphasized the need to establish actual compensable damage rather than merely demonstrating that an investment was controversial or risky.

The alleged benchmark or hypothetical investment strategy also had to be sufficiently established. The claim could not succeed merely by proposing an arbitrary alternative portfolio. (Omnilex AI)

Principle

There are therefore at least three separate questions:

Was there a breach?

Did the breach cause loss?

Can the amount of that loss be proved?

Failure at any one of these stages can defeat the claim.

This is particularly important in high-value wealth-management litigation because the parties frequently disagree over the appropriate benchmark portfolio.

7. Case 5 — BGH, II ZR 30/09, Germany, 31 May 2010

Bundesgerichtshof, II ZR 30/09

This case concerned liability connected with an investment in a closed real-estate fund and deficiencies in the investment prospectus.

The Federal Court recognized that inaccurate or misleading information concerning expected economic performance could constitute a legally relevant breach of pre-contractual duties. (Bundesgerichtshof)

Relevance to wealth management

Portfolio losses do not necessarily originate from the manager's trading decisions.

The investment itself may have been based on:

defective prospectuses;

inaccurate forecasts;

undisclosed assumptions;

misleading performance expectations; or

incomplete risk information.

In those circumstances, litigation can involve prospectus liability and pre-contractual information duties in addition to ordinary portfolio-management liability.

Damage calculation

German jurisprudence also recognizes the possibility, in appropriate circumstances, of restoring the investor to the position that would have existed had the investment not been made.

However, taxation, distributions, residual value, and other benefits may need to be taken into account.

8. Case 6 — BGH, XI ZR 42/13, Germany, 28 January 2014

This case concerned bank liability arising from investment advice and the treatment of tax advantages when calculating damages.

The German Federal Court addressed whether tax benefits obtained from an investment should be deducted from an investor's compensation.

The Court recognized that the calculation cannot be performed mechanically: where substantial tax advantages were obtained, their treatment may become relevant to the final compensation calculation. (Bundesgerichtshof)

Importance

This is highly relevant to wealth-management litigation involving wealthy investors because the investment may have generated:

tax deductions;

loss allocations;

capital allowances;

tax credits;

distributions; or

other financial benefits.

A claimant cannot ordinarily obtain compensation that places them in a better economic position than proper performance would have done.

This is the principle of avoiding overcompensation.

9. Case 7 — BGH, III ZR 105/05, Germany, 19 January 2006

The German Federal Court dealt with claims arising from allegedly incorrect investment advice concerning various equity funds whose market values subsequently declined.

The claimant alleged that the investments had been recommended following incorrect advice.

The case is particularly useful for understanding the distinction between:

investment-advice liability;

investment-service-provider status;

limitation rules; and

the point at which the claim arises. (Bundesgerichtshof)

Importance for portfolio-loss litigation

An investor cannot assume that the limitation period necessarily begins only when the investment eventually reaches its lowest value.

Depending on the legal basis of the claim, the legally relevant damage may arise at an earlier stage.

Therefore, a wealth-management claimant must investigate limitation issues immediately after discovering:

unsuitable investments;

undisclosed commissions;

misleading advice;

mandate breaches; or

other advisory failures.

10. Case 8 — BGH, XI ZR 316/13, Germany, 20 January 2015

This case concerned investment advice relating to a cross-currency swap.

The claimant alleged that the bank had failed to provide adequate information concerning the characteristics and risks of the transaction.

The Federal Court ultimately rejected the claim because the evidence did not establish a breach of the advisory duties in the particular circumstances. The client's knowledge, financial capacity, risk appetite, initiative in selecting the transaction, and desired transaction characteristics were relevant. (Bundesgerichtshof)

Why this is important

It demonstrates the other side of portfolio-loss litigation.

A large loss does not automatically prove negligent advice.

Courts examine:

what the client wanted;

what the client knew;

what the adviser knew;

the complexity of the product;

the client's experience;

the client's risk tolerance;

whether warnings were given; and

whether the product was appropriate.

This prevents hindsight from becoming the legal standard.

11. Case 9 — Genil 48 and Comercial Hostelera de Grandes Vinos v Bankinter and BBVA, CJEU, Case C-604/11

Court of Justice of the European Union, 30 May 2013, ECLI:EU:C:2013:344

Although this was not a conventional discretionary portfolio-management damages case, it is an important European authority for investment advice and suitability obligations.

The case concerned interest-rate swaps and the interpretation of the EU Markets in Financial Instruments Directive.

The CJEU explained the circumstances in which a recommendation may constitute investment advice, particularly where the recommendation is presented as appropriate for the particular client or is based upon consideration of that client's circumstances. (InfoCuria)

Importance for wealth management

This is important because modern wealth management frequently combines:

investment advice;

portfolio construction;

discretionary management;

financial-product selection; and

execution services.

A claimant may therefore need to determine precisely what service the financial institution actually provided.

Different obligations can attach to:

execution-only services;

investment advice;

portfolio management; and

other investment services.

12. Case 10 — General Court of the European Union, Case T-406/15, 2 July 2019

This case is useful as an illustration of the strict approach to proving financial loss.

The claimant alleged capital loss associated with inadequate or insufficiently dynamic management of financial assets and relied on portfolio-management documents.

The General Court rejected the damages claim because the evidence did not adequately establish the amount and reality of the alleged loss. The court emphasized that a claim for compensation must establish actual and sufficiently certain damage, rather than relying upon an imprecise estimate of what professional management might have produced. (EUR-Lex)

Lesson

A claimant cannot simply say:

“A professional wealth manager would have achieved 2% more.”

The claimant should normally provide a defensible methodology demonstrating:

starting assets;

actual transactions;

actual performance;

fees;

withdrawals;

deposits;

dividends;

interest;

taxes where legally relevant;

market movements;

appropriate benchmark;

hypothetical compliant transactions; and

resulting difference.

13. Core Legal Elements of a Portfolio-Loss Claim

A typical European civil claim can be broken down as follows:

Element 1 — Existence of a legal relationship

There must normally be evidence of:

wealth-management agreement;

investment-advisory agreement;

banking contract;

mandate;

brokerage agreement;

fiduciary relationship; or

another legal basis of responsibility.

Element 2 — Scope of the mandate

The claimant must establish what the manager was actually instructed to do.

For example:

“Capital must be preserved and no more than 20% may be invested in equities.”

is substantially different from:

“The manager has full discretion to pursue an aggressive growth strategy.”

The Swiss Federal Supreme Court's jurisprudence illustrates why the agreed risk profile is central to the analysis. (Bundesgericht)

Element 3 — Professional duty

The manager may owe duties of:

care;

loyalty;

diligence;

suitability;

diversification;

monitoring;

disclosure;

risk assessment;

conflict management;

execution;

reporting; and

compliance with investment restrictions.

Element 4 — Breach

Examples include:

investing in prohibited securities;

excessive concentration;

ignoring the client's risk profile;

unauthorized trading;

inadequate investigation;

failure to disclose material risks;

failure to monitor investments;

excessive leverage;

improper use of derivatives;

undisclosed commissions;

conflict of interest; or

failure to rebalance where required.

14. Causation Is Usually the Hardest Issue

The investor must normally demonstrate a causal connection between the breach and the financial loss.

Consider:

Portfolio = €10 million

A financial crisis reduces the market generally by 20%.

The portfolio falls to:

€8 million.

The manager is alleged to have negligently placed 30% into an unsuitable asset class.

If a properly managed portfolio would have fallen only 10%, the hypothetical value would be:

€9 million.

The potentially recoverable loss is therefore approximately:

€9 million − €8 million = €1 million

rather than the entire €2 million decline.

This is broadly consistent with the comparative methodology found in the Dutch Wealth Management Partners litigation and the Swiss Federal Supreme Court's approach to hypothetical portfolios. (Rechtspraak)

15. The Hypothetical Portfolio Problem

The claimant must identify what the portfolio should have looked like.

Possible benchmarks include:

contractual benchmark;

government-bond index;

agreed portfolio allocation;

comparable conservative portfolio;

market index;

specified investment policy;

historical asset allocation; or

another demonstrably appropriate counterfactual.

An arbitrary benchmark is dangerous.

The Geneva and Swiss cases demonstrate that the court requires a convincing evidentiary foundation for the proposed alternative portfolio. (Omnilex AI)

16. Market Loss Versus Managerial Loss

This distinction is fundamental.

Ordinary market loss

The investment falls because:

equities decline;

interest rates rise;

currency values change;

geopolitical events occur;

recession affects markets; or

an entire asset class declines.

This is generally part of investment risk.

Manager-caused loss

The loss results from:

breach of the mandate;

inappropriate concentration;

unauthorized leverage;

unsuitable products;

negligent selection;

failure to diversify;

failure to monitor;

misleading information; or

conflict-related decisions.

The second category is much more likely to generate civil liability.

17. Risk Profile as the Central Standard

European courts frequently examine the client's actual risk profile.

Typical categories include:

The classification itself is not decisive. The court examines the actual contractual agreement and factual circumstances.

The Dutch case is particularly striking because a portfolio described as risk-averse had more than 80% exposure to hedge funds, which the court considered inconsistent with the agreed strategy. (Rechtspraak)

18. Concentration and Diversification

A manager can potentially be liable where the portfolio becomes excessively concentrated.

For example:

70% in one corporate issuer;

60% in one technology sector;

50% in one emerging market;

80% in hedge funds;

40% in one illiquid private fund.

But concentration is not automatically negligent.

The legal question is:

Was the concentration inconsistent with the mandate and the level of professional care required in the circumstances?

An aggressive investor may authorize concentration that would be inappropriate for a pension-preservation mandate.

19. Liquidity Risk

Wealth managers must also consider whether the investment can be liquidated when the client needs the money.

This becomes especially important for:

hedge funds;

private equity;

private credit;

structured products;

real estate funds;

long-term bonds;

restricted shares; and

alternative investments.

A portfolio intended to finance retirement may require substantially greater liquidity than a portfolio belonging to an investor with no immediate cash requirements.

20. Failure to Diversify

A claim may arise where the manager failed to diversify despite a mandate requiring prudent diversification.

Examples:

90% of the portfolio invested in a single asset class.

or

Almost the entire portfolio invested in related funds.

or

Several supposedly independent funds actually exposed the client to the same underlying securities.

The last situation is particularly important in modern wealth management because nominal diversification does not necessarily equal economic diversification.

21. Hidden Correlation

A portfolio can contain ten funds but still be economically concentrated.

For example:

Fund A invests in European banks.

Fund B invests in European bank bonds.

Fund C invests in financial-sector derivatives.

Fund D invests in bank-related structured products.

The portfolio may appear diversified by number of investments but actually contain substantial financial-sector concentration.

A sophisticated wealth manager may therefore be expected to understand the underlying exposures rather than merely count the number of funds.

22. Fees and Commissions

Portfolio-loss litigation can also involve:

management fees;

performance fees;

entry charges;

exit charges;

distribution commissions;

retrocessions;

fund-level charges; and

related-party compensation.

The German case law demonstrates that undisclosed remuneration can be relevant to an investor's claim for damages and possible unwinding of an investment. (Bundesgerichtshof)

23. Conflicts of Interest

Potential conflicts include:

proprietary products;

affiliated funds;

related-party securities;

preferential commissions;

placement fees;

soft-dollar arrangements;

incentives for trading;

remuneration based upon particular products.

A manager who recommends a product because it produces a financial benefit to the manager rather than because it is appropriate for the client may face serious civil liability.

24. Unauthorized Investment

This is generally stronger than a mere poor-performance claim.

Suppose the mandate states:

“No derivatives.”

The manager nevertheless invests 20% in derivatives.

Even if the derivatives ultimately generate a profit, the manager may have breached the mandate.

If they generate a loss, the causal connection may be considerably easier to establish.

25. Stop-Loss and Monitoring Obligations

The German XI ZR 423/06 case is particularly useful for disputes involving allegations that a manager failed to react to substantial portfolio deterioration. (Anwalt24)

But courts must avoid imposing hindsight-based duties.

The correct question is not:

“After the market crashed, why didn't the manager sell?”

It is:

“At the time when the decision had to be made, what would a reasonably competent manager, acting under this mandate and possessing the available information, reasonably have done?”

That distinction is essential.

26. Client's Own Contribution to the Loss

Defendants frequently argue:

the client approved the investments;

the client received warnings;

the client knew the risks;

the client demanded aggressive returns;

the client refused diversification;

the client failed to provide information;

the client delayed selling.

These matters can potentially reduce or defeat a claim depending upon national law.

However, a signed risk disclosure does not necessarily eliminate liability where the manager independently breached an express investment mandate.

The Dutch case is instructive because the manager's contractual investment obligations remained central despite its attempts to rely upon risk information and disclaimers. (Rechtspraak)

27. Professional Versus Retail Investor

The claimant's sophistication can materially affect the case.

A court may distinguish between:

Retail investor

Limited financial knowledge and experience.

High-net-worth individual

Substantial assets but potentially limited technical investment expertise.

Professional investor

Sophisticated investment knowledge and experience.

Institutional investor

Professional organization with specialized personnel.

The level of protection and the reasonable expectations concerning information may differ accordingly.

28. Wealth Manager's Duty Is Not a Guarantee of Profit

This principle should be emphasized.

A wealth manager generally promises:

competent management according to the mandate

not:

a guaranteed investment return.

Therefore:

Loss + no breach = generally no liability.

Whereas:

Breach + causation + proven damage = potential liability.

The Swiss and German authorities demonstrate this distinction particularly clearly. (Federal Supreme Court of Switzerland)

29. Direct Loss and Consequential Loss

A claimant may potentially seek compensation for:

Direct financial loss

The difference between actual and properly managed portfolio value.

Transaction costs

Where caused by unauthorized or unnecessary transactions.

Management fees

Where paid for services that were materially deficient, subject to applicable national law.

Lost investment opportunity

Potentially recoverable where sufficiently established.

Financing costs

Where the breach caused additional borrowing or financing expenses.

Tax consequences

Relevant where legally connected to the investment and sufficiently proven.

Interest

Usually governed by national procedural/substantive rules.

30. Lost Opportunity Claims

These are particularly difficult.

An investor may argue:

“Had the manager behaved properly, I would have invested elsewhere and earned 8%.”

The court will normally require evidence showing:

what alternative investment would actually have been made;

whether it was consistent with the client's risk profile;

whether the client would actually have made the investment;

whether the alternative return is objectively established; and

whether the claimed return is speculative.

The EU General Court's approach demonstrates the danger of using an unsupported percentage to calculate portfolio-management damages. (EUR-Lex)

31. Evidence Required in Litigation

A strong portfolio-loss claim normally requires:

Contractual evidence

wealth-management agreement;

investment mandate;

risk-profile questionnaire;

investment policy statement;

amendments;

client instructions.

Financial evidence

account statements;

transaction histories;

portfolio reports;

valuation statements;

fee schedules;

tax documents.

Communication evidence

emails;

investment recommendations;

telephone records;

meeting notes;

warnings;

suitability assessments.

Expert evidence

Often necessary for:

portfolio reconstruction;

market comparison;

causation;

appropriate benchmark;

investment-risk assessment.

32. Burden of Proof

The precise allocation varies by jurisdiction.

Generally, the claimant needs to establish:

the legal relationship;

the relevant obligation;

breach;

damage; and

causal connection.

Some jurisdictions may impose additional evidentiary duties upon professional financial institutions, particularly concerning documentation of advice and compliance.

Consequently, incomplete records held by the manager can become highly significant.

33. Contractual Exclusion Clauses

Wealth-management agreements often contain clauses attempting to exclude liability for:

market fluctuations;

investment losses;

force majeure;

third-party failures;

changes in market conditions.

Such clauses do not necessarily protect the manager against:

fraud;

gross negligence;

intentional misconduct;

breach of mandatory statutory obligations;

unauthorized transactions; or

other liabilities that national law does not permit parties to exclude.

The Dutch case is instructive: the court found that the manager's serious failure of care prevented reliance upon the relevant exclusion clause. (Rechtspraak)

34. Regulatory Breach Versus Civil Liability

This is another critical distinction.

A breach of:

MiFID;

MiFID II;

national financial-services legislation; or

regulatory guidance

does not automatically mean that the investor receives damages.

A civil court may still have to determine:

whether the rule creates a private-law duty;

whether it was incorporated into the contractual relationship;

whether national law gives a damages remedy;

whether causation exists;

and what loss was actually caused.

The CJEU's Genil 48 judgment is important because it clarifies the regulatory nature of suitability/appropriateness requirements, while the ultimate civil consequences remain substantially dependent upon the applicable national legal system. (InfoCuria)

35. Typical Defences by Wealth Managers

A defendant will commonly argue:

1. Market risk

“The portfolio declined because markets declined.”

2. Client authorization

“The client expressly approved the investment.”

3. Risk disclosure

“The client received adequate warnings.”

4. Sophistication

“The client was an experienced investor.”

5. No causation

“The same loss would have occurred under any reasonable strategy.”

6. Benchmark failure

“The claimant's proposed alternative portfolio is unrealistic.”

7. Contributory negligence

“The claimant contributed to the loss.”

8. Limitation

“The action was commenced too late.”

9. Contractual exclusion

“The management agreement excludes liability.”

10. No actual damage

“The portfolio subsequently recovered or remains profitable.”

The Swiss 4A_72/2020 judgment illustrates the importance of proving actual compensable damage rather than simply identifying a questionable investment decision. (Federal Supreme Court of Switzerland)

36. Comparative Case-Law Table

37. Six Particularly Important Principles Emerging from the Cases

Principle 1 — Risk must correspond to the mandate

The Dutch BV0422 case provides a particularly strong example: placing more than 80% of a risk-averse portfolio into hedge funds was incompatible with the agreed investment strategy. (Rechtspraak)

Principle 2 — Portfolio losses must be causally linked to the breach

A market crash by itself does not make the manager liable.

Principle 3 — Hypothetical portfolio analysis is often essential

Courts may compare actual performance against the portfolio that would have existed had the manager complied with the mandate. (Rechtspraak)

Principle 4 — Actual damage must be proven

An investor cannot simply provide an arbitrary percentage representing alleged lost returns. (EUR-Lex)

Principle 5 — Client sophistication matters

The court examines the actual client, not merely an abstract investor.

Principle 6 — Regulatory compliance and civil compensation are related but distinct

MiFID duties can be highly relevant to determining professional standards, but the ultimate damages claim is generally governed by the applicable national private-law system.

38. Hypothetical Example

Assume a German or Dutch wealth manager receives:

€5 million

under a conservative mandate.

The contract permits:

30% equities;

60% high-quality fixed income;

10% alternatives.

Instead, the manager invests:

70% equities;

20% hedge funds;

10% cash.

A market crisis then occurs.

The actual portfolio falls to:

€3.9 million.

Expert evidence establishes that a compliant portfolio would have been worth:

€4.6 million.

Potential manager-specific loss:

€700,000.

The investor cannot necessarily claim the entire €1.1 million decline because €400,000 may represent market loss that would have occurred even under proper management.

This is precisely why courts focus on the counterfactual portfolio.

39. Portfolio Management Versus Investment Advice

The distinction is important.

Investment advice

The institution recommends:

“You should buy Fund X.”

The client makes the final decision.

Discretionary portfolio management

The manager is authorized to make investment decisions on behalf of the client.

The manager therefore assumes substantially greater responsibility for:

allocation;

diversification;

monitoring;

execution;

compliance with restrictions.

Execution-only service

The client independently decides what to purchase and instructs the institution to execute the transaction.

The liability analysis can therefore be materially different.

The CJEU's Genil 48 decision demonstrates the importance of identifying the precise nature of the investment service being supplied. (InfoCuria)

40. Remedies

Depending on the national legal system and facts, remedies can include:

Damages

Compensation for proven loss.

Restitution/unwinding

The investor may in certain circumstances seek to unwind an improperly entered investment.

Return of fees

Potentially available where services were materially defective or fees were improperly charged.

Interest

Compensation for delayed payment where national law permits.

Declaratory relief

A court may declare that the manager breached the agreement.

Injunctive or preventive relief

Potentially relevant where unauthorized management is continuing.

Account reconstruction

A court or expert may reconstruct the portfolio as it should have been managed.

41. Overall Legal Assessment

European wealth-management portfolio-loss litigation is fundamentally based upon a comparison between contractual expectations, professional duties, actual management and demonstrable financial consequences.

The strongest claimant is generally not the investor who merely says:

“My portfolio lost money.”

The stronger case is:

“The manager agreed to follow a conservative strategy; it materially departed from that strategy; the departure was professionally unreasonable; the departure caused identifiable additional losses; and those losses can be calculated by reference to an objectively defensible hypothetical portfolio.”

The Dutch Wealth Management Partners decision is a particularly strong example of this approach, while the Swiss 4A_72/2020 judgment provides an important framework for understanding the relationship between the management mandate, risk profile and calculation of damages. (Rechtspraak)

The German authorities add important principles concerning continuing management duties, defective investment information, advisory obligations, limitation and the treatment of tax advantages. (Anwalt24)

In short, the central civil-law test is usually:

Mandate → Professional duty → Breach → Causation → Counterfactual portfolio → Quantifiable damage → Appropriate remedy.

That framework makes wealth-management portfolio loss one of the most technically demanding areas of European financial civil litigation.