Key Takeaways
- Since the Brexit vote in 2016, UK equities have suffered persistent annual net outflows, a collapse in global benchmark weight, and widespread fund closures.
- But UK equities have outperformed US and global markets since 2022, driven by a strong value rotation and resilient dividends.
- For the next decade, a key challenge for UK equities will be the ability to attract and retain listed companies.
Almost 10 years on from the Brexit referendum, the UK equity market continues to reflect the consequences of a decision that battered investor confidence and altered the country’s position within global portfolios. Brexit was not the root cause of the UK market’s challenges, but it acted as a catalyst, accelerating pre‑existing structural weaknesses and reinforcing a prolonged reassessment of the UK’s relevance to international investors.
Prior to the 2016 vote, the UK equity market was already facing headwinds. Domestic pension demand for UK stocks was in long‑term decline, global investors were increasingly allocating toward US growth markets, and the UK’s sector composition was poorly aligned with the dominant drivers of global equity returns. Structural underweights to technology and other growth sectors left the market reliant on financials, energy, and defensive stocks, which struggled during an extended period of low interest rates. As a result, the UK entered the referendum period from a position of relative fragility.
Brexit amplified these pressures by increasing political and economic uncertainty at a critical moment. Concerns over trade relations, regulation, immigration, and the long‑term growth outlook raised the perceived risk attached to UK assets and undermined investor confidence, prompting a reassessment of strategic UK allocations.
This confidence shock is most clearly visible in investor behavior. Following the referendum, flows into UK equity funds deteriorated steadily, before becoming entrenched after the UK formally exited the European Union in January 2020. Since 2016, cumulative net outflows from UK equity funds have reached around USD 160 billion, with withdrawals broad based across fund structures and market capitalizations. These sustained outflows point to a structural disengagement rather than short‑term volatility.
At the same time, the UK’s footprint within global equity benchmarks declined materially. Two decades ago, the UK accounted for close to 10 percent of the MSCI All Country World Index. Today, that figure stands at around 4%. For passive investors, this reduced UK exposure over time, while for active investors it reinforced perceptions of the UK as a lower‑priority and increasingly benchmark‑driven market.
The Next 10 Years for UK Stocks: Reasons for Optimism
- Potential for improved UK-EU relations eases trade frictions and supports business confidence.
- Discounted UK stocks could act as a catalyst for higher returns.
- Active fund strategies could attract inflows again if performance trends continue.
- Pension fund reforms could increase domestic equity allocations.
- The London Stock Exchange has announced a series of rule changes designed to reduce the regulatory burden and reinforce the Alternative Investment Market’s appeal to growth companies.
Investors Switch to US Stocks, Tech, Passive Funds
Capital leaving UK equities did not disappear. Investor allocations were redirected toward US markets, while passive strategies gained share as the economics of active UK equity management deteriorated. Large cap active managers were particularly affected, with persistent outflows from traditional UK strategies. In contrast, the bulk of inflows that did occur within the UK equity universe accrued to passive providers, reflecting fee pressure and the growing influence of benchmark construction.
The impact on the asset management industry has been severe. Since 2016, hundreds of UK equity funds have closed, reflecting sustained outflows, declining assets under management, and intensifying competition. Each closure represents a commercial judgment on the viability of running a UK-focused equity strategy in an environment of structurally weak demand.
Brexit’s effects were compounded by subsequent shocks. The covid‑19 pandemic, rising inflation, geopolitical conflict, and domestic policy missteps further eroded international confidence. Inward foreign direct investment declined after 2016, while some multinational firms relocated operations to preserve access to the EU’s single market. While isolating Brexit’s precise economic cost is difficult, these developments reinforced a negative narrative around UK assets.
Over the 2010s, sector composition proved a persistent drag on performance. Growth-oriented sectors dominated global returns during an ultra‑low interest rate environment, yet played only a minimal role in the UK. From 2010 to 2025, technology accounted for roughly half of total returns in the US equity index but only a small fraction in the UK, which remained heavily tilted toward energy, financials, materials, and defensive sectors.
UK Stock Market Outperforms Since 2022
Recent years have been brighter. Since 2022, UK equities have outperformed US and global markets, driven by a rotation from growth to value and by higher interest rates that favored cash‑generative sectors where the UK is structurally overweight. Energy and banks benefited in particular, while the UK’s resilient dividend profile regained appeal. Notably, this period of outperformance occurred without meaningful valuation multiple expansion.
The recovery, however, has been uneven. Large-cap UK equities have delivered strong returns, supported by global revenue exposure and favorable sector positioning, while small and mid caps have lagged, weighed down by domestic exposure and valuation compression.
Despite recent improvement, valuations still reflect deep pessimism. UK equities continue to trade at a substantial discount to US markets, with small and mid caps particularly depressed relative to history and global peers. Yet, elevated merger and acquisition activity and record share buybacks suggest that boards and overseas acquirers increasingly see value in UK-listed companies.
One of the defining challenges for UK equities over the next decade will be the ability to attract and retain listed companies. Elevated M&A activity and a weak IPO pipeline have caused the number of listings to decline by 27% since the end of 2015. The pull of alternative venues is significant—boards increasingly favor exchanges where valuations are better reflected, with many opting for the US, where liquidity is deeper and valuations richer. How policymakers respond will be critical in determining whether London can reclaim its position as a leading global listing venue.
This article is taken from the report The Brexit Decade: How a Vote Reshaped UK Markets.
