Investment Liquidity: The Hidden Risks of Money Market Funds

by | Apr 28, 2026

New guidelines from European regulators are sharpening how Money Market Funds (MMFs) must test for crisis scenarios. For investors with international portfolios, this means a greater emphasis on liquidity—but also new blind spots in risk management. The right strategy and independent oversight determine whether these changes protect your assets or lead to unexpected losses.

The New Rules of the Game

Regulators are pushing the boundaries. New stress test guidelines force fund managers to model scenarios that seemed extreme just a few years ago but are now considered realistic. This isn’t just theory; it’s about how quickly cash can be raised from a portfolio when market liquidity begins to dry up.

“Liquidity is not about whether you can sell an asset. It is about at what price and how quickly you can do so the moment you need it.”

What Exactly Is Changing?

Stress tests now work with specific, stringent numbers. For weekly liquidity, managers must model net outflows of up to 40% for professional investors and 30% for retail clients. In the event of a broader macroeconomic shock, the figures are set at 20% and 10%, respectively.

For a fund with €50 million in assets, a 40% outflow means the necessity to liquidate €20 million in a very short window. If the underlying assets are less liquid, this pressure immediately translates into a lower share price.

Beyond simple redemptions, these tests now strictly monitor:

  • Interest rate fluctuations and their impact on valuation.

  • Credit spread widening (the risk of corporate defaults).

  • Currency volatility and combined “macro-shocks.”

The challenge remains: while models are becoming more precise, they are still based on pre-defined scenarios. Real markets have a tendency to surprise us exactly where the models end.

The Impact on Your Portfolio

At first glance, stricter testing seems to increase safety. However, there are trade-offs every investor should consider:

  1. Lower Yields: Higher liquidity requirements mean managers must hold more “easy-to-sell” assets, which typically offer lower returns.

  2. Concentration Risk: Scenarios now account for the sudden exit of the two largest investors. If you are among the top stakeholders, your individual decisions directly impact the fund’s stability and, indirectly, the price of everyone’s shares.

  3. Currency vs. Liquidity: In a crisis, a weakening currency combined with low liquidity can make a quick exit impossible without significant loss.

💡 STRATEGIC TIP: Look beyond marketing materials. Monitor the investor concentration and the actual liquidity profile of the fund’s assets. These parameters—not past performance—decide your outcome in a crisis.

Strategic Steps for the Global Investor

It is time to stop viewing Money Market Funds as “risk-free parking lots.” They are liquidity tools, not guarantees of absolute stability.

  • Diversify your liquidity: Do not rely on a single fund or a single jurisdiction. A combination of instruments reduces the pressure during market-wide redemptions.

  • Scenario Planning: Be specific. What happens if you need to liquidate 30% of your portfolio within one week? The answer must be concrete.

  • Independent Oversight: While fund managers follow the rules, they do not always consider your individual global context.

Aisa International focuses on reviewing the structure, risks, and long-term strategy of your holdings. Our role is to provide the oversight that ensures your wealth remains stable across different borders and regulatory shifts.


FAQ – Frequently Asked Questions

1. How often are these stress scenarios updated? At least once a year, reflecting current market developments and volatility.

2. Does higher liquidity always mean higher safety? Partially, yes. However, it usually comes at the cost of lower returns as the fund holds more cash-like instruments.

3. Can a fund restrict redemptions? Yes. In extreme market conditions, funds may implement “gates” or delays to protect the remaining investors.

4. How can I judge a fund’s liquidity quality? By looking at the asset structure and investor concentration, rather than just the credit rating.

5. Does it make sense to hold multiple funds simultaneously? Absolutely. Diversifying your liquidity sources is a key defense mechanism in crisis scenarios.

The views expressed in this article are not to be construed as personal advice. Therefore, you should contact a qualified, and ideally, regulated adviser in order to obtain up-to-date personal advice with regard to your own personal circumstances. Consequently, if you do not, then you are acting under your own authority and deemed “execution only”. The author does not accept any liability for people acting without personalised advice, who base a decision on views expressed in this generic article. Importantly, where this article is dated then it is based on legislation as of the date. Legislation changes but articles are rarely updated, although sometimes a new article is written; so, please check for later articles or changes in legislation on official government websites, as this article should not be relied on in isolation.

Vyjádřené názory v tomto článku nelze považovat za osobní poradenství. Vždy se proto obraťte na kvalifikovaného, ideálně regulovaného poradce, který vám poskytne aktuální, osobní doporučení šitá na míru vaší konkrétní situaci. Pokud se rozhodnete jednat bez takového poradenství, činíte tak na vlastní odpovědnost a vaše jednání spadá pod režim „execution only“ (pouhá realizace pokynu bez poradenství). Autor nepřijímá žádnou odpovědnost za rozhodnutí osob, které se spoléhají na názory uvedené v tomto obecném článku bez personalizovaného poradenství. Je důležité si uvědomit, že pokud je článek datován, vychází z právních předpisů platných k uvedenému datu. Právní předpisy se mohou měnit a články jsou aktualizovány jen zřídka. Doporučujeme proto vždy ověřit případné novější články nebo změny legislativy na oficiálních vládních stránkách, protože na tento článek nelze spoléhat izolovaně.

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Post written by:
Autorem článku je:

Monika Škubalová

Monika works in the area of compliance and financial crime prevention, where she specializes in setting internal rules and control mechanisms to protect the company from financial and regulatory risks. She has experience in providing professional advice and implementing processes in accordance with legislation. She actively participates in training the internal team and supports the corporate culture of responsibility and transparency.

Aisa International is the only financial advice service company specialising in advice for expats that is regulated as a Securities Trader in the Czech Republic, USA, and UK.