AI remains a powerful long-term investment theme, but recent volatility shows the dangers of relying too heavily on a narrow group of winners. UK large caps offer a different mix of sectors, valuations and income that can help make portfolios more resilient. James Flintoft, Head of Investment Solutions at AJ Bell tells us more.
The latest sell-off in AI-linked stocks is a reminder that markets can become fragile when too much of the global equity narrative rests on one theme.
Semiconductor and memory chip names have been at the centre of recent weakness, with pressure spreading across the US, South Korea and Taiwan as investors reassess valuations, capital spending plans and the sustainability of demand expectations.
The long-term investment case for AI has not disappeared. The build-out of data centres, advanced chips and supporting infrastructure remains a powerful structural theme.
However, when expectations are high, markets can react sharply to any sign that growth may be less linear than previously assumed.
The risk for investors is not that AI suddenly stops mattering, but that too much of the return they are chasing comes from the same narrow part of the market.
This is where UK equities still have an important role to play. The UK market has lagged the AI-led rally, partly because it has much lower exposure to mega-cap technology and semiconductor businesses.
That has been a headwind in a market led by a narrow group of winners, but it can become a strength when leadership starts to wobble.
The FTSE 100 and broader UK large cap market have a very different sector profile from the US and many global indices, with more exposure to healthcare, energy, financials, consumer staples and industrials, and far less exposure to the highly valued technology names that have dominated global returns.
This gives UK equities a distinct return profile and can reduce reliance on a single investment theme.
Many UK large caps are mature, cash-generative businesses with global revenues, established market positions and more value-oriented characteristics.
They may not offer the same excitement as the most prominent AI beneficiaries, but that is precisely why they can be useful when investors rediscover the value of earnings resilience, dividends and balance sheet strength.
This is not a simple argument for UK equities over global equities, or for defensives over growth. A well-constructed portfolio needs both.
If global equity exposure has become increasingly concentrated in technology, AI infrastructure, semiconductors and memory stocks, investors need to think carefully about what provides balance when that trade comes under pressure.
Looking for diversification beyond the UK
UK equities can form part of that balance, but they should not be the only diversifier. Select opportunities in other regions and sectors are also important, particularly where valuations, earnings quality or structural drivers look attractive without relying solely on the immediate AI narrative.
That includes carefully chosen exposure to US energy, US healthcare and US utilities.
These sectors may be overlooked because they do not sit at the centre of the semiconductor-led AI trade, but they can still be long-term beneficiaries through rising power demand, medical innovation, operational efficiency and infrastructure investment. They can also act as important diversifiers across different market scenarios.
Recent volatility has reinforced the danger of treating global equity markets as more diversified than they really are. An index can look broad on paper while returns are driven by a relatively small number of companies, sectors and countries.
That concentration can work well on the way up, but leaves portfolios more exposed when sentiment turns.
For UK equities, the recent lag versus AI-heavy markets should be seen in context. They have not been the engine of the latest rally, but their lower technology weighting, global revenue base, valuation discount and defensive sector mix can contribute to a more balanced equity allocation.
This is particularly the case when combined with sectors linked to long-term AI adoption but not dependent on near-term semiconductor and memory chip stock performance.
Diversification is rarely most popular when it is most needed. When one theme is driving markets, anything outside that theme can look dull or inefficient.
Yet when volatility returns, different sources of return become crucial. Diversification is the shock absorber in a portfolio. You do not notice it on a smooth road. You are grateful for it when the road turns rough.
UK equities may not be the most exciting part of a global portfolio, but their differentiated characteristics remain valuable as investors question the durability of the AI-led trade.
That points to a more practical takeaway: investors can still back the AI theme, but they should be wary of letting it dominate every part of their equity exposure.
A combination of UK large caps, selective global opportunities, US energy, US healthcare, US utilities and disciplined regional and sector diversification – an allocation choice adopted by AJ Bell’s funds and MPS – can help portfolios remain resilient when market leadership narrows, while retaining exposure to areas that may benefit from AI over the long term.”
Past performance is not a reliable guide to future returns. You may not get back the amount originally invested, and tax rules can change over time. The writer’s views are their own and do not constitute financial advice.
This information should not be relied upon by retail clients or investment professionals. Reference to any particular investment does not constitute a recommendation to buy or sell the investment.
Main image: AI, luke-jones-tBvF46kmwBw-unsplash
