Investment Strategy

Growing wealth may make global investment diversification, multi-currency planning, and Swiss wealth management increasingly relevant.
Nearly one million additional US dollar millionaires were recorded globally in 2025. The United States accounted for almost half of the increase, adding more than 440,000 new millionaires.
This is a notable reflection of American wealth creation. It also raises an important planning question:
How much of that wealth remains dependent on the United States?
A portfolio may contain numerous securities while remaining concentrated in one country, currency, economic cycle, and financial system. For newly wealthy Americans, global diversification can therefore become an important consideration in wealth preservation and long-term planning.
This does not require abandoning successful US investments. It means reviewing whether one country has become responsible for too much of a family’s financial future.
For some investors, Switzerland may form part of that discussion. Certain independent Swiss wealth managers are registered with the US Securities and Exchange Commission and can advise eligible American clients within the applicable US regulatory framework.
What does the rise in American millionaires mean for wealth planning?
The United States continues to demonstrate a strong capacity for personal wealth creation through entrepreneurship, business ownership, compensation, property appreciation, disciplined saving, and long-term participation in financial markets.
Reaching millionaire status, however, often marks the beginning of a new planning phase.
The focus gradually shifts from accumulation to questions such as:
- How should the wealth be protected?
- Is the portfolio appropriately diversified?
- Could future spending arise in other currencies?
- Are estate and succession plans aligned with the family’s current wealth?
- Should banking and custody relationships remain concentrated in one country?
As wealth grows, investment management increasingly becomes part of a broader planning conversation.
Can a portfolio look diversified while remaining US-centric?
Yes.
Many American investors own hundreds or even thousands of securities. Yet their overall exposure may still be predominantly American.

Their wealth may be concentrated in:
- US-listed equities;
- US government and corporate bonds;
- US real estate;
- domestic retirement accounts;
- US financial institutions; and
- the US dollar.
Even American multinational companies remain influenced by US valuations, regulation, market sentiment, and economic conditions.
The issue is not that US assets are inherently unsuitable. The United States remains home to deep capital markets, innovative companies, and globally important industries.
The relevant question is whether the family’s overall wealth has become overly dependent on a single domestic environment.
What is home-bias risk?
Home bias is the tendency to allocate a disproportionate share of a portfolio to an investor’s domestic market.
This preference is understandable. Domestic investments feel familiar, are reported in the investor’s primary currency, and are widely discussed in local media.
Familiarity, however, is not the same as diversification.
Home bias may leave a family disproportionately exposed to one:
- economic cycle;
- interest-rate environment;
- political and regulatory system;
- currency;
- equity-market valuation structure; and
- banking and custody framework.
International diversification cannot eliminate risk, but it may reduce reliance on a single market or outcome.
Why can greater wealth increase concentration risk?
Wealth often becomes concentrated precisely because certain assets have performed well.
An entrepreneur may retain a significant position in the company that created the family’s wealth. An executive may accumulate employer shares over many years. A property portfolio may appreciate substantially. Long-term exposure to US markets may also become increasingly dominant.
The concentration becomes clearer when the family’s entire balance sheet is reviewed.
A household may have a US-based business, domestic property, retirement accounts, equity holdings, banking relationships, income, and future liabilities all tied to the same country.
The assets may be spread across different products, but the underlying dependency remains.
That is why wealth preservation requires looking beyond the investment portfolio alone.
Does global diversification mean reducing confidence in the United States?
No.
Global diversification is not a prediction that US markets will underperform. Nor does it require an investor to withdraw from them.
The objective may simply be to complement existing US exposure with investments in other regions, currencies, sectors, and economic systems.
Depending on the investor’s circumstances, this could include exposure to developed European markets, Switzerland, the United Kingdom, Asia-Pacific economies, selected emerging markets, international fixed income, infrastructure, or businesses with different return drivers.
The appropriate approach will vary.
An entrepreneur with substantial US business exposure may require a different strategy from a retiree whose income and spending remain entirely domestic. An internationally mobile family may also have different currency and jurisdictional needs.
Diversification should therefore begin with the family’s actual circumstances rather than a standard allocation model.
Why should currency exposure be reviewed separately?
Currency exposure can become increasingly important as a family’s financial life becomes more international.
Children may study abroad. A second home may be purchased in Europe. Family members may relocate. Future healthcare, education, retirement, or lifestyle expenses may arise outside the United States.

In such cases, holding nearly all assets in US dollars may create a mismatch between the currency in which wealth is held and the currencies in which it may eventually be spent.
Some families therefore consider measured exposure to currencies such as the Swiss franc, Euro, or British pound.
Foreign-currency holdings introduce exchange-rate risk and may increase volatility when measured in dollars. The purpose is not to speculate on currencies, but to determine whether the portfolio reflects the family’s likely future liabilities.
Is investment diversification enough?
Not always.
A globally invested portfolio may still be held entirely within one banking and custody jurisdiction.
For some families, this is entirely appropriate. Others may wish to evaluate whether maintaining financial relationships in more than one well-regulated country supports their long-term objectives.
Jurisdictional diversification may involve reviewing:
- where assets are custodied;
- which legal and regulatory systems apply;
- how different currencies are accessed;
- how concentrated banking relationships have become; and
- whether the structure supports international mobility and succession planning.
International accounts do not remove US tax or reporting obligations. American citizens and US tax residents generally remain subject to applicable US taxation and financial-account disclosure requirements wherever their assets are held.
Any cross-border structure should therefore be developed transparently and in coordination with qualified legal and tax professionals.
Why does Switzerland remain relevant to American investors?

Switzerland has a long-established financial sector serving internationally active clients, including through multi-currency investment and custody arrangements.
Its relevance for American investors is not based on secrecy. Modern Swiss wealth management for US clients operates within extensive regulatory, tax-reporting, and compliance requirements.
For internationally minded Americans, Switzerland may offer:
- global and multi-currency portfolio management;
- an international perspective on asset allocation;
- established private-banking and custody infrastructure;
- experience with internationally mobile families;
- coordination across investment, succession, residence, and cross-border planning; and a financial relationship outside the investor’s home jurisdiction.
These potential benefits must be weighed against account minimums, costs, currency risk, tax considerations, investment restrictions, and regulatory complexity.
Switzerland will not be suitable for every American investor. Its relevance depends on the family’s objectives and circumstances.
Can Swiss wealth managers advise American clients?
Some can, but not every Swiss wealth manager or private bank is positioned to serve US persons.
American investors should distinguish between a financial institution that accepts US-connected accounts and an investment adviser registered to provide regulated advice to US clients.
Certain independent Swiss wealth managers are registered with the US Securities and Exchange Commission as investment advisers. Their registration and regulatory disclosures can be reviewed through the SEC’s Investment Adviser Public Disclosure database.
Registration does not imply SEC approval, endorsement, or a guarantee of investment performance. It does, however, provide investors with a public record containing information about the firm’s services, fees, ownership, conflicts, and disciplinary history.
How can a Swiss advisor complement existing US relationships?
A Swiss wealth manager does not necessarily replace a family’s US accountant, attorney, estate planner, or domestic financial advisor.
The relationship may instead complement the existing advisory structure.
The Swiss advisor may focus on global portfolio management, international custody, currency exposure, and jurisdictional diversification. US professionals may continue advising on federal and state tax matters, estate planning, trusts, succession, and business ownership.
This coordinated approach recognizes that investment, tax, legal, and family decisions are closely connected.
International wealth planning is rarely an investment-only exercise.
What should newly wealthy Americans review first?
A meaningful review may begin with the following questions:
- How much of the family’s net worth is linked directly or indirectly to the United States?
- Is too much wealth concentrated in one company, industry, property market, or currency?
- Is the portfolio globally diversified in substance?
- Where are the family’s assets custodied?
- Could future liabilities arise in other currencies?
- Are estate and succession plans aligned with the current value and location of the assets?
- Would additional international banking or advisory relationships support the family’s long-term objectives?
The purpose is not to create unnecessary complexity. It is to determine whether the structure that supported wealth creation remains suitable for wealth preservation and succession.
How could global diversification be implemented?
Global diversification should be deliberate rather than reactive.
It should not be driven solely by political headlines, short-term market movements, or predictions about the US dollar.

A considered process typically begins with the family’s:
- total balance sheet;
- liquidity needs;
- tax circumstances;
- future liabilities;
- investment horizon;
- risk tolerance; and
- succession objectives.
Implementation may occur gradually through rebalancing, redirecting new cash flows, introducing measured foreign-market or currency exposure, and establishing additional custody relationships where appropriate.
There is no universal allocation suitable for every millionaire. The strategy should reflect the person and family behind the portfolio.
Frequently Asked Questions
What is home bias in an investment portfolio?
Home bias is the tendency to hold a disproportionate share of investments in an investor’s domestic market. For Americans, this may result in substantial exposure to US equities, bonds, real estate, financial institutions, and the US dollar.
Does international diversification guarantee wealth preservation?
No. Diversification cannot guarantee gains or prevent losses. International investments may introduce currency, political, regulatory, liquidity, tax, and market risks.
Can Americans legally hold investments in Switzerland?
Yes, subject to the policies of the financial institution and applicable US and Swiss requirements. US persons generally remain responsible for relevant US tax, disclosure, and financial-account reporting obligations.
How can an American verify a Swiss advisor’s SEC registration?
The advisor can be searched through the SEC’s Investment Adviser Public Disclosure database. Investors should review the firm’s Form ADV and confirm its registration, services, fees, conflicts, disciplinary history, and other relevant disclosures.
Summary
The creation of nearly one million new millionaires in 2025 is an important global wealth story. The United States accounted for more than 440,000 of them.
For many newly wealthy Americans, the next challenge will be different from the one that created their wealth.
Accumulation often rewards focus, conviction, entrepreneurship, and sustained exposure to successful assets. Preservation may require broader geographic, currency, custody, and jurisdictional diversification.
A family can own many investments and still remain highly dependent on one country and financial system.
Reviewing that concentration does not mean turning away from the United States. It means asking whether a structure built for wealth creation is also prepared for long-term preservation, international mobility, and succession.
For some families, a relationship with an SEC-registered Swiss wealth manager may form part of that broader planning process.
About the Author
Market conditions and broader economic factors can significantly impact the value of investments. Investments in international markets are subject to additional risks, such as currency exchange fluctuations, political or economic instability, and variations in accounting practices. Alternative investments, including but not limited to hedge funds, private equity, and real estate, may be illiquid, speculative, and are not suitable for all investors.
The above information should be considered before making any investment decisions.
All posts and publications are for your information only and are not intended as an offer, promotion, or solicitation to buy or sell any financial instrument or perform any other financial transactions. All information and opinions expressed in posts and publications reflect our current views as of the date of the publication and may be liable to change without notice.
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