When Diversification Becomes a Source of Return

For much of the past decade, diversification has felt like something investors were required to tolerate rather than rewarded for embracing.

The logic remained sound: spread risk across regions, sectors and investment styles rather than allowing a portfolio to depend upon a narrow group of companies. The practical experience was less convincing. US equities repeatedly outperformed, while the largest technology companies outperformed almost everything else. Owning less of them often meant accepting lower returns.

But that relationship may be changing. Diversification is no longer simply about cushioning a portfolio if market leadership fails. It may increasingly provide access to the next sources of market leadership.

The rally is broadening—not necessarily ending

In its August 2026 paper, Looking beyond the obvious in stocks, UBS Global Wealth Management’s Chief Investment Office argues that investors should look beyond the S&P 500 for the next phase of the global equity rally.

Importantly, UBS is not forecasting the end of the US advance. It continues to expect gains from the S&P 500 by the end of the year, but identifies additional opportunities across Europe, Japan and the wider Asia-Pacific region.

This is an important distinction.

The argument is not that American exceptionalism is over, nor that artificial intelligence has ceased to be a powerful investment theme. It is that the return opportunity may be becoming broader than the relatively small group of companies that supplied the infrastructure for the first stage of the AI investment cycle.

The US market can continue to rise while other regions and sectors also perform well. Indeed, stronger participation beyond a narrow collection of technology companies would arguably make the advance more durable.

From building AI to using it

The earliest and most visible beneficiaries of AI were semiconductor manufacturers, cloud platforms and hyperscalers committing enormous sums to data centres. Those businesses may remain important, but they are no longer the only potential winners.

UBS identifies opportunities among semiconductor-equipment manufacturers and companies positioned to benefit from the rising power demand created by electrification, digitalisation and AI infrastructure. Its broader European thesis also encompasses defence, infrastructure, automation and energy security.

This widens the investable universe considerably.

The next stage could include companies providing power generation, grid equipment, cooling, automation and specialist industrial components. Beyond the physical infrastructure, value may gradually migrate towards businesses capable of using AI to improve productivity, reduce costs or accelerate product development.

Healthcare companies could apply it to drug discovery and diagnostics. Industrial businesses may benefit from automation and more efficient supply chains. Financial companies can use it in underwriting, fraud prevention and customer servicing.

The technology opportunity may therefore be rebuilding in a broader and potentially quite different form from the Nasdaq-led trade that initially dominated it.

Europe’s opportunity is more specific than “cheap equities”

Europe has frequently been presented as a value opportunity simply because it trades at a discount to the US. A low valuation, however, is not a catalyst by itself.

The more persuasive case is that Europe’s underlying investment cycle may be changing. According to UBS, STOXX Europe 600 companies are on course to deliver their strongest second-quarter profit growth in four years. The firm sees a more durable investment cycle developing around defence, infrastructure, AI, automation, electrification and energy security.

UBS specifically favours European banks, healthcare, industrials and consumer-discretionary companies, together with Germany and its own “European Leaders” theme.

This is not an argument for buying every inexpensive European company. It favours businesses with demonstrable exposure to rising investment, improving earnings and stronger cash generation. Manager and stock selection remain important, particularly where economic sensitivity and financing costs differ significantly between large and smaller companies.

Europe also remains more exposed than the US to energy-market disruption. Its improving outlook is therefore credible, but not unconditional.

Asia offers more than one investment story

Japan combines several potentially supportive forces: improving corporate governance, stronger shareholder distributions and greater capital discipline.

UBS reports that Japanese operating-profit growth exceeded 20% year on year during the second quarter. It believes the market has probably established a cyclical bottom and that its recent valuation reset has created attractive entry points in high-quality companies with durable earnings growth.

Its preferred opportunities span both sides of the broadening thesis: semiconductor-equipment and power-demand beneficiaries alongside banks, machinery companies and other cyclical businesses.

Across Asia excluding Japan, UBS forecasts earnings growth of 72% in 2026 and 20% in 2027, supported by the AI hardware supply chain and a recovery in cyclical industries. It remains constructive on mainland China, preferring A-shares to H-shares, and has upgraded India to “Attractive”.

That headline Asian earnings forecast should nevertheless be treated carefully. It is likely to be heavily influenced by semiconductor cyclicality, concentrated technology exposure and favourable comparisons with the previous year. It should not be interpreted as evidence that profits are growing at that rate across the typical Asian company.

There are also concentration risks. A small number of semiconductor and internet companies now exert considerable influence over some Asian and emerging-market indices. Diversifying beyond the US should not mean replacing one form of concentration with another.

UBS itself highlights the potential role of building-block portfolios and actively managed approaches in less extensively researched parts of Asia. Active selection can be especially valuable where index-level exposure gives a misleading impression of genuine diversification.

What this means for the MGTS Qualis Growth Fund

This broadening thesis closely resembles the direction in which we have already moved the portfolio.

We have deliberately reduced our reliance on the Nasdaq and widened our US exposure. This retains participation in American earnings growth without allowing the portfolio to depend excessively upon its most concentrated segment.

At the same time, the fund has maintained meaningful exposure to Japan and emerging markets, alongside global smaller companies, mid-sized businesses, value and quality-dividend strategies. These allocations provide access to different regions, market capitalisations and sources of corporate return.

That positioning does not require US technology shares to fall. It requires only that a wider range of businesses begins to participate in global profit growth.

Nor does the UBS view justify chasing whichever overseas market has most recently performed well. The appropriate response is to examine whether the portfolio has access to the underlying drivers of broadening: industrial investment, improving corporate governance, shareholder distributions, financial strength and the adoption—not merely the construction—of AI.

Diversification without dilution

There is an important difference between diversification and dilution.

Adding more holdings does not automatically improve a portfolio. If different funds own the same companies or depend upon the same economic outcome, the appearance of diversification can be deceptive. Genuine diversification requires exposure to genuinely different sources of return.

UBS illustrates the concentration problem using the self-managed investors on its platform. Excluding strategic holdings, almost 40% hold more than half of their equity portfolios in no more than ten stocks. When the gap between the best- and worst-performing companies is unusually wide, individual portfolio outcomes become increasingly dependent upon precisely which companies are owned.

For many years, diversification carried a visible opportunity cost because market leadership remained extraordinarily narrow. The developing change is that it may now provide both risk control and participation in areas where earnings expectations, investment flows and valuations have greater room to improve.

The objective is not to predict the exact moment when US mega-cap leadership ends. It is to ensure that the portfolio does not require it to continue indefinitely.

For investors, that may be the most important development in the current market: diversification is becoming more than protection against what could go wrong. It is increasingly about gaining exposure to what could go right next.

This article is for information only and does not constitute investment advice or a personal recommendation. Capital is at risk, and the value of investments can fall as well as rise.