Paying for Conviction, Receiving the Crowd: A UK Active Fund Audit
Active fund fees are a claim on judgement. The investor pays for someone to choose securities differently from the market. When the resulting portfolio looks, moves and behaves like the benchmark, the claim weakens. That is the quiet problem of benchmark hugging: not outright deception, but a gap between what is sold and what is delivered.
In the UK, the issue has sharper edges in 2026. Passive vehicles now hold a large share of UK equity assets, platforms publish clean fee comparisons, and the FCA's Consumer Duty asks firms to evidence value. Yet closet indexing can survive because it is hard to see from a performance chart alone. An audit is needed.
The shape of a disguised index fund
A benchmark-hugging fund rarely advertises itself. It may hold 60 to 90 stocks, call itself 'core' or 'risk-controlled', and describe its process as disciplined. Look through the portfolio and the pattern is familiar: the top ten names are the index's top ten, sector weights sit within a percentage point or two of the benchmark, and cash is minimal.
None of that is automatically improper. Some mandates are explicitly designed to track closely with a small risk budget. The question is whether the fee reflects that restraint. If a fund is constrained to look like the FTSE All-Share, it should not charge as though it were free to ignore it.
Three tests that make the disguise visible
The first is active share: the proportion of a portfolio that differs from the benchmark. A rough reading is that 60% or more suggests meaningful stock selection; 40% or below looks index-like; 20% is very close. The measure has limits. It depends on the benchmark, it can be high in concentrated portfolios for structural reasons, and it says nothing about skill. But it is a useful first filter.
The second is holdings overlap. Compare the fund's top ten or twenty positions with the index. Count how many names appear and how their weights differ. A fund whose largest holdings are the same companies at similar weights is not expressing much conviction. The third is sector drift: add up the absolute differences between portfolio sector weights and benchmark sector weights. A small total suggests the manager is following the index's shape.
Tracking error and R-squared complete the picture. Very low tracking error alongside high R-squared is consistent with hugging. These figures are on fact sheets, though they are often presented as risk statistics rather than as evidence about the fee.
Why the practice persists
Benchmark hugging is a rational response to career risk. A manager who deviates can underperform for years and lose the mandate; a manager who hugs the benchmark is unlikely to be sacked for being unremarkable. Mandate design reinforces this. Many 'active' funds are sold as core holdings, judged against a broad index, and expected to stay close to it.
Distribution matters too. Platforms and advisers use simple labels, and a fund that sits in the middle of its sector is easier to justify than one that takes a distinctive position. The economics are comfortable: an active fee applied to an index-like portfolio is a profitable arrangement for the manager, even if it is a poor deal for the investor.
Consumer Duty has made value assessments more explicit, but it has not outlawed closet indexing. A firm can argue that its fund offers risk control, access or a smoother ride. Investors should read those arguments closely and ask what they are paying for.
Short-term comfort, long-term cost
Hugging can flatter performance over short periods. It captures market beta, avoids the embarrassment of a single stock blowing up, and keeps a fund in the middle of the pack. In a rising market, that looks like competence. In a falling one, it offers no protection beyond the index.
The cost is cumulative. The fee gap between an active fund and a cheap index tracker compounds against the investor every year. Add transaction costs and the occasional performance fee, and the hurdle becomes higher. A fund that delivers index returns before fees will deliver less than the index after fees. That is arithmetic, not opinion.
Low active share is not proof of a bad fund. Some cheap, tax-efficient funds hug deliberately and say so. The problem is paying active prices for index behaviour without being told.
Questions to put before paying active fees
Ask for active share against the stated benchmark and how it has changed over three and five years. Ask for tracking error, R-squared and the largest active weights. Ask how many of the top ten holdings match the index and where the fund has deliberately diverged. Ask for the ongoing charges figure, transaction costs and any performance fee. Then ask what evidence supports the fee under the firm's value assessment.
A manager should be able to explain what would make the fund look different from the index. If the answer is vague, the portfolio probably is too.
A practical audit for a UK DIY investor
Start with the latest fact sheet and annual report. Compare the top ten holdings with the index factsheet. Check sector weights. Use a platform screener or the Investment Association sector data to get context. Then compare the fund with a low-cost tracker on total cost, not just headline performance.
Do not switch on active share alone. Consider tax wrappers, platform exit fees and dealing costs. Inside an ISA, capital gains tax is not the issue, but platform charges are. Keep a short written note of why the fund is held and what would trigger a review. An annual check is enough; quarterly tinkering is not an audit.
The central question is not active versus passive. It is whether the fee buys a different portfolio. If the holdings are the index, the investor should pay index prices.
