Asset allocation — the decision about how to divide an investment portfolio between different asset classes — is the single most important investment decision an investor makes. Research consistently shows that the split between equities, bonds, alternatives, and cash accounts for the vast majority of long-term portfolio return variation. For internationally mobile investors, getting this right requires attention not only to risk and return, but to currency, geography, and the tax consequences of different structures.
The building blocks: major asset classes
Equities (shares) represent ownership in companies. Over long periods, global equities have historically delivered the highest returns of any mainstream asset class, in exchange for the highest volatility. Equities should form the core of any long-term, growth-oriented portfolio. For international investors, global equities — spanning North America, Europe, Asia-Pacific, and selectively emerging markets — provide broad exposure and reduce concentration in any single economy.
Fixed income (bonds) are debt instruments that pay regular income (coupon payments) and return the principal at maturity. Government bonds from highly rated issuers (UK gilts, US Treasuries, German Bunds) are low-risk and provide stability. Corporate bonds offer higher yields with more credit risk. Bonds generally reduce portfolio volatility and partially cushion equity drawdowns, making them valuable in balanced and cautious portfolios.
Property provides income (rental yield) and inflation linkage. Exposure can be achieved through direct property ownership or through Real Estate Investment Trusts (REITs) — listed companies that own income-producing real estate and distribute most of their income to shareholders. REITs provide liquidity that direct property lacks.
Alternative investments include private equity, hedge funds, infrastructure, commodities, and other assets that are not traditional equities or bonds. These can provide diversification and returns that are less correlated with public markets. Access is generally restricted to high-net-worth investors and professional investors; minimum investment thresholds are typically high.
Cash and short-term instruments provide liquidity and capital protection but are eroded by inflation over time. A cash allocation in the portfolio serves as a buffer and a source of funds for planned expenditure.
Asset allocation frameworks by risk profile
The appropriate asset allocation depends primarily on:
- Risk tolerance: how much volatility you can psychologically accept
- Capacity for loss: how much financial loss you can bear without materially compromising your financial position
- Time horizon: how long before you need to draw on the portfolio
- Income requirements: whether the portfolio needs to generate regular income
Indicative allocations by risk profile are set out below. These are illustrative ranges:
| Risk Profile | Equities | Fixed Income | Alternatives | Cash |
|---|---|---|---|---|
| Cautious | 20–35% | 50–65% | 5–10% | 5–10% |
| Balanced | 45–65% | 25–40% | 5–15% | 5% |
| Growth | 65–80% | 10–25% | 5–20% | 0–5% |
| Aggressive | 80–100% | 0–10% | 0–20% | 0–5% |
These are starting points. Individual circumstances — including the size of the portfolio, the client's other assets, their income security, and their specific objectives — will cause the allocation to vary from any generic template.
Geographic allocation for internationally mobile investors
For a UK domestic investor, a significant allocation to UK equities makes sense — it aligns investment exposure with the currency of spending and benefits from familiarity with the UK economic environment. The UK accounts for roughly 4% of global equity market capitalisation, so even a moderate UK overweight is a meaningful active bet.
For an internationally mobile investor, the case for a UK-heavy portfolio is much weaker:
Liability currency matters. If your spending is primarily in USD, EUR, or AED, holding a sterling-heavy portfolio introduces currency risk that serves no purpose. The portfolio's geographic allocation should reflect the currencies of your actual liabilities.
Global diversification reduces risk. A globally diversified equity portfolio — spanning the US, Europe, Asia, and emerging markets — reduces the impact of any single country's economic cycle or market performance.
Benchmark alignment. A global equity portfolio can be benchmarked against the MSCI World or MSCI All Country World index, which is transparent and widely accepted. This is more meaningful than benchmarking against a UK-only index for an investor with minimal UK spending obligations.
Practical allocation approach. For an internationally mobile investor without a strong single "home" currency, a global equity allocation might start with market-weight exposure (roughly 60%+ US, 15–20% Europe, 10–15% Asia-Pacific, 5–10% emerging markets) and then be adjusted based on the specific currencies of the investor's liabilities.
Alternative investments for internationally mobile clients
Alternative investments are less liquid than equities and bonds, have higher minimum investment thresholds, and often operate on longer investment horizons. However, they offer real diversification benefits:
Private equity has historically generated returns above quoted equity markets over the long term, though with significant illiquidity (capital is typically locked up for 7–12 years). Accessible through closed-ended funds, limited partnerships, or via a discretionary manager's alternatives allocation.
Infrastructure (airports, toll roads, energy networks) provides stable, inflation-linked income with low correlation to equity markets. Available through listed infrastructure funds and unlisted fund structures.
Hedge funds use a variety of strategies to generate returns with lower correlation to equity markets. Outcomes vary widely. Quality and strategy selection matter greatly, and due diligence is demanding.
Commodities (gold, energy, agricultural commodities) can provide inflation protection and diversification, but produce no income and can be highly volatile. Gold has historically served as a store of value in times of currency stress.
Access to alternatives is one of the key benefits of working with a discretionary wealth manager rather than managing a portfolio independently through a retail platform.
Rebalancing: keeping allocation on track
Over time, market movements cause asset class weights to drift from their targets. Left unchecked, a portfolio that begins as 60% equities/40% bonds will shift progressively to a higher equity weight during a bull market, increasing risk beyond what was intended.
Rebalancing restores the target allocation. The main approaches:
Threshold-based rebalancing: rebalance when any asset class moves more than a defined percentage from its target weight — commonly 5%. This avoids unnecessary trading when drift is small but ensures action when it becomes material.
Calendar-based rebalancing: review and rebalance on a set schedule (quarterly, semi-annually, annually) regardless of drift. Simple and predictable.
Combination: use thresholds, with a minimum annual review.
For taxable accounts (such as a GIA), the tax consequences of rebalancing trades should be considered. Rebalancing within a tax-deferred wrapper (such as an offshore bond) is preferable where possible, as no tax event arises from trades within the wrapper.
Life stage and the glide path
Asset allocation is not static — it should evolve as your life circumstances change. The concept of a "glide path" describes the shift from higher-risk, growth-oriented allocations in the accumulation phase of life to more conservative, income-oriented allocations as retirement approaches and in retirement itself.
Key transition points that should prompt an allocation review:
- Approaching retirement (10 years out and again 5 years out)
- A significant inheritance or other wealth event
- A change in employment or income
- A major change in spending plans (property purchase, school fees beginning or ending)
- A change in country of residence or tax status
See our guide on annual financial plan reviews for more on when and how to review your allocation.
This article is for general information only and does not constitute financial or investment advice. The value of investments can fall as well as rise and you may get back less than you invest. Asset allocation does not guarantee returns or prevent losses. Seek advice from a qualified international financial adviser before making investment decisions.
How Global Investments can help
Global Investments provides professionally managed, globally diversified portfolios for internationally mobile clients, tailored to individual risk profiles, currency requirements, and tax situations. Our investment committee oversees strategic asset allocation and rebalancing across all client mandates. Contact our team to discuss your portfolio, or read our guide on wealth management for expats.
Frequently Asked Questions
What is asset allocation and why does it matter?
Asset allocation is how you divide an investment portfolio between different asset classes — equities, bonds, property, alternatives, and cash. Academic research consistently shows that asset allocation accounts for the majority of long-term portfolio performance variation, more than individual security selection or market timing.
What is a typical balanced portfolio allocation?
A balanced portfolio for a medium-risk investor typically holds 50%–65% equities, 25%–40% bonds, and a small allocation to alternatives or cash. The precise split depends on the investor's time horizon, risk tolerance, and income requirements. These are illustrative ranges, not prescriptions.
How often should I rebalance my portfolio?
Most investors rebalance when the actual allocation drifts materially from the target — typically more than 5% in any asset class. Some investors rebalance quarterly or annually on a calendar basis. The approach should be defined in advance and applied consistently.
Should international investors hold more equities than domestic UK investors?
Not necessarily more, but typically with a different geographic mix. A UK domestic investor with a high allocation to UK equities has significant concentration risk. An internationally mobile investor with multi-currency liabilities benefits from broader geographic diversification, aligning equity holdings with global market weights rather than a UK-heavy bias.
How does life stage affect asset allocation?
Younger investors with long time horizons and stable income can typically sustain higher equity allocations, as they have time to recover from market downturns. As retirement approaches, the allocation typically shifts towards bonds and income-producing assets to reduce volatility and protect capital. This life-stage adjustment is sometimes described as a 'glide path'.
This guide is for general information only and does not constitute financial advice or a personal recommendation. The value of investments can fall as well as rise and you may get back less than you invest. Tax rules, pension legislation, and investment regulations change — always verify current rules and seek advice from a qualified independent financial adviser before making any financial decisions.