In Brief:
- Global diversification reduces risk and enhances growth by spreading investments across countries and currencies.
- International investing provides access to unique industries, innovation, and emerging markets.
- Risks include currency fluctuations, political instability, higher costs, and liquidity challenges.
- Use mutual funds, ETFs, and ADRs for simple, cost-effective exposure to overseas markets.
- Aim for 20–40% of your equity allocation in international stocks for optimal diversification.
In today’s interconnected world, investors have unprecedented access to markets across the globe. While it’s natural to gravitate toward familiar domestic companies, limiting your investments to a single country can expose your portfolio to unnecessary risks and missed opportunities.
Global diversification—investing in overseas markets alongside your home market—offers a powerful way to manage risk, tap into new growth, and build a more resilient portfolio.
Why Global Diversification Matters
The core principle of diversification is not to put all your eggs in one basket. By spreading investments across different geographic regions, you reduce reliance on any one economy or market.
If a local downturn, political crisis, or sector-specific shock hits your home market, investments in other regions may offset the losses, lowering overall portfolio risk and enhancing resilience.
During the 2022 market downturn, the U.S. stock market fell nearly 20%, but some overseas markets—like Turkey (+90%) and Chile (+19%)—performed much better. By holding international assets, investors cushioned their losses.
Nearly half of global stock market opportunities exist outside the U.S. International markets offer exposure to industries, sectors, and companies not available domestically. For instance, Asia is a hub for technology and manufacturing, Europe for luxury goods and pharmaceuticals, and Latin America for natural resources.
Emerging markets can present especially high growth potential, while developed markets may offer stability and reliable returns. By investing globally, you can capitalize on trends and innovations wherever they arise.
Investing internationally introduces exposure to foreign currencies. While this can add risk, it also acts as a natural hedge. If your home currency weakens, gains in foreign currency holdings can help offset the impact.
Conversely, if the dollar strengthens, overseas investments may lose value even if the underlying stocks rise. Over the long term, currency diversification can smooth returns and provide a buffer against inflation or local economic shocks.
Markets in different regions often move out of sync due to distinct economic cycles, political events, and sector drivers. Global diversification helps smooth portfolio performance over time, reducing volatility and providing more consistent growth.
How to Invest Internationally
1. Mutual Funds and ETFs
International mutual funds and exchange-traded funds (ETFs) are the simplest way to gain broad exposure to overseas markets. These funds may track global, regional, or country-specific indexes, or focus on developed, emerging, or frontier markets.
- Index funds: Track benchmarks like the MSCI EAFE (Europe, Australasia, Far East) or MSCI Emerging Markets Index.
- Actively managed funds: Fund managers select international stocks they believe will outperform.
- Global funds: Invest in both U.S. and non-U.S. markets.
- Regional/country funds: Focus on specific areas (e.g., Asia-Pacific, Latin America, Japan).
Pros:
- Instant diversification across many companies and countries.
- Professional management and research.
- Lower transaction costs than buying individual foreign stocks.
Cons:
- Fund fees (especially for active funds).
- Limited control over individual holdings.
- Potential for higher capital gains distributions in active funds.
2. American Depositary Receipts (ADRs)
ADRs are U.S.-listed securities representing shares in foreign companies. They trade in U.S. dollars on U.S. exchanges, making them accessible and convenient for American investors.
Pros:
- No need to open a foreign brokerage account.
- Dividends paid in dollars.
- Lower transaction costs than direct foreign investing.
Cons:
- Not all foreign companies offer ADRs.
- Still subject to currency risk and foreign market volatility.
3. Direct Investment in Foreign Stocks
Some investors open global accounts with brokers like Fidelity, Schwab, or Interactive Brokers, or with local brokers in the target country, to buy shares directly on foreign exchanges.
Pros:
- Access to a wider universe of companies.
- Ability to participate in local IPOs or smaller firms.
Cons:
- Higher transaction costs, taxes, and currency conversion fees.
- Complex tax reporting and potential for regulatory differences.
- Greater research and due diligence required.
4. Multinational Companies
Investing in U.S.-listed multinational firms with significant overseas revenues (e.g., Coca-Cola, Apple, Procter & Gamble) provides some international exposure.
However, research shows that these companies tend to move with the U.S. market, so they are not a substitute for true global diversification.
5. International Bonds and Real Assets
Global diversification isn’t limited to stocks. International bonds, real estate investment trusts (REITs), and commodities offer additional ways to tap into overseas growth and diversify risk.
Benefits of Global Diversification
Enhanced Growth Potential. By tapping into both developed and emerging markets, investors can access higher growth rates, new industries, and innovation not available domestically. For example, emerging markets like India, Brazil, and China have delivered double-digit annualized returns in certain periods, outpacing developed markets.
Risk Reduction. Spreading investments across countries with different economic cycles, political climates, and market drivers helps reduce the impact of local downturns or sector-specific shocks. A globally diversified portfolio is more resilient to unexpected events, such as recessions, elections, or regulatory changes.
Currency Diversification. Holding assets in multiple currencies can protect against a decline in your home currency and add a layer of stability to your returns. Currency effects can be positive or negative in the short term, but over time, they tend to mean-revert, enhancing the benefits of diversification.
Access to Unique Opportunities. Some of the world’s most innovative companies or fastest-growing industries may be based outside your home country. International investing opens the door to sectors like Asian technology, European luxury goods, or Latin American natural resources.
Improved Portfolio Resilience. A portfolio diversified across regions is better equipped to weather global economic changes, policy shifts, or market volatility, leading to more stable long-term returns.
Risks of Global Diversification
While global diversification offers substantial benefits, it also introduces unique risks that investors must understand and manage.
Currency Risk. Fluctuations in exchange rates can amplify or erode returns on foreign investments. For example, if you invest in a European stock and the euro weakens against the dollar, your returns in dollars will be reduced—even if the stock price rises in euros.
- Use currency-hedged funds to minimize short-term currency swings.
- Diversify across multiple currencies to reduce reliance on any one exchange rate.
- Accept that currency effects tend to balance out over long periods.
Political and Regulatory Risk. Investing overseas exposes you to different legal systems, political environments, and regulatory frameworks. Political instability, policy changes, or government intervention can affect companies, industries, or entire markets.
Examples of political or regulatory risk include: nationalization of industries in emerging markets, sudden changes in tax or trade policies, or restrictions on capital flows or foreign ownership.
Steps to take to manage these risks include:
- Diversify across countries and regions.
- Favor countries with stable political and legal systems.
- Consider political risk insurance for large or concentrated positions.
Higher Transaction Costs and Taxes. International investing often involves higher brokerage fees, taxes, and other transaction costs compared to domestic investing. These can include brokerage commissions, stamp duties, levies, and exchange fees, as well as withholding taxes on dividends or interest.
To manage these risks:
- Use ADRs, ETFs, or mutual funds to minimize direct costs.
- Research tax treaties and reporting requirements for each country.
Liquidity and Information Risk. Some foreign markets are less liquid or transparent than U.S. markets. Lower trading volumes can make it harder to buy or sell shares at fair prices, and less robust disclosure standards can make research more challenging.
How to manage:
- Focus on larger, more established markets and companies.
- Use funds managed by professionals with local expertise.
- Be cautious with thinly traded or opaque securities.
Systematic and Correlation Risk. During global crises, markets can move in tandem, reducing the benefits of diversification. Systematic risk—such as recessions or geopolitical shocks—can affect all markets simultaneously.
How to manage:
- Recognize that diversification reduces, but doesn’t eliminate, risk.
- Maintain a balanced allocation across asset classes (stocks, bonds, real assets).
Over-Diversification and Complexity. Holding too many funds or securities can dilute returns and increase complexity without proportionally reducing risk. It’s important to strike a balance between diversification and manageability.
Practical Strategies for Global Diversification
- Determine Your Allocation. Major investment firms recommend allocating between 20% and 40% of your stock portfolio to international equities, and 20%–30% of your bond portfolio to international bonds. Aggressive investors may go higher, while conservative investors may prefer lower allocations.
- Use Broad Funds for Core Exposure. For most investors, broad-based international index funds or ETFs provide cost-effective, diversified exposure to thousands of companies worldwide. Examples include Vanguard Total International Stock Index Fund (VXUS), iShares MSCI ACWI ex U.S. ETF (ACWX), and Vanguard Total International Bond ETF (BNDX).
- Add Targeted Exposure. Consider adding regional, country, or sector funds to capture specific opportunities or balance your portfolio. For example, emerging market ETFs (EEM, VWO) or Asia-Pacific funds.
- Monitor Currency and Political Risks. Stay informed about currency trends, political events, and regulatory changes in the countries where you invest. Consider currency-hedged funds if you want to reduce short-term volatility.
- Rebalance Regularly. International markets can be more volatile than domestic markets, so regular rebalancing is essential to maintain your target allocation and risk profile.
Global diversification is a foundational principle of modern investing. By allocating assets across countries, regions, and currencies, you reduce reliance on any single market, access new growth opportunities, and build a more resilient portfolio.
While international investing introduces unique risks—currency, political, and liquidity among them—these can be managed with the right strategies and tools.
Consider two hypothetical portfolios during a European economic slowdown:
- Portfolio A: 100% European equities. Suffers a 15% loss due to local market challenges.
- Portfolio B: 50% European, 30% U.S., 20% Asia-Pacific. Experiences only a 5% dip, as gains in U.S. and Asian markets cushion the losses.
For most investors, the easiest and most effective way to achieve global diversification is through low-cost mutual funds or ETFs that provide broad exposure to international markets.
Regularly review your allocation, stay informed about global trends, and rebalance as needed. By doing so, you’ll be better positioned to weather local downturns, capture global growth, and achieve your long-term financial goals.
Chief Analyst and global trade expert Carl Delfeld provides insights and recommendations on the best stocks in the world in theCabot Explorer advisory service. With an emphasis on China and other Asian countries, Delfeld identifies the biggest trends and opportunities literally anywhere around the world.