The debate between active and passive investing has been resolved by data, if not by consensus. The majority of actively managed funds underperform their benchmarks after fees over every meaningful time horizon. Understanding the evidence — and its nuances — is essential for building an efficient international portfolio.
This is not a case for abandoning active management entirely. But it is a case for treating it as an exceptional choice requiring exceptional justification, not the default.
The SPIVA Reports: What They Show
S&P Dow Jones Indices publishes the SPIVA (S&P Indices Versus Active) scorecard twice yearly. It is the most comprehensive ongoing analysis of active versus passive performance. The findings have been consistent for over 20 years:
Over 1 year: Active fund underperformance rates vary, typically 50–65% of actively managed funds underperform their benchmark in any given year
Over 5 years: 75–80% of actively managed large-cap equity funds underperform their benchmark after fees
Over 10 years: 85–90% of actively managed funds underperform
Over 20 years: Approximately 90–95% of actively managed funds underperform their benchmark after fees
These figures apply to:
- US large-cap equity (the most studied market)
- European equity
- UK equity
- Emerging markets equity (with some nuance — see below)
The pattern is consistent across geographies. The underperformance is not a market-cycle artefact — it persists across bull and bear markets, through recessions, and through periods of high volatility.
The Survivorship Bias Problem
The SPIVA underperformance figures are striking, but they actually understate the problem for one important reason: they account for survivorship bias. Many studies of active fund performance do not.
Survivorship bias arises because underperforming funds close or merge into other funds. If you only look at funds that exist today, you are looking at the survivors — which are disproportionately the good performers. The bad ones have been quietly buried.
When SPIVA accounts for closed and merged funds and includes them in the analysis, the underperformance rate increases. The average investor who picked an active fund at random ten years ago and the fund is now closed — they were likely in an underperforming fund.
The practical implication: if you look at a fund manager's track record and it shows strong performance, you need to ask whether you are seeing the whole story or just the funds that survived long enough to have a track record worth showing.
The True Cost of Active Management
Performance data is typically presented gross of fees, or with a simple total expense ratio (TER) deducted. The true cost of active management is higher.
Explicit costs:
- Ongoing charges figure (OCF) / TER: The annual percentage charged for fund management. Active equity funds typically charge 0.7–1.2% per annum. Passive equivalents: 0.07–0.20% per annum for index ETFs. The annual difference of 0.5–1.0% compounds significantly over time.
Transaction costs:
- Active funds trade more frequently than passive funds. Every trade has a bid-ask spread cost and, in many cases, a market impact cost (the price moves against you when you buy or sell large positions). These costs are often partially visible in the KIID but are rarely fully transparent.
Tax drag (for UK investors):
- Higher turnover in active funds means more frequent realisation of capital gains within the fund, which in an unwrapped (non-ISA, non-SIPP) account creates taxable events for the investor.
The compound effect:
Consider two portfolios, both earning the market return of 7% per annum, one paying 0.15% in costs (passive) and one paying 1.15% in costs (active, before any alpha):
- After 20 years, £100,000 at 6.85% net = £374,000
- After 20 years, £100,000 at 5.85% net = £310,000
The difference is £64,000 — entirely attributable to costs, before any consideration of whether the active fund actually beats the market (which the evidence suggests it probably will not).
Where Active Management Genuinely Adds Value
The case for passive investing is strongest in large, liquid, well-researched markets. It is less overwhelming in:
Small-cap equities
Small and micro-cap stocks are less thoroughly researched by sell-side analysts. Information asymmetry is higher. An active manager with genuine analytical edge can, in principle, exploit mispricings that do not exist in large-cap markets where thousands of analysts cover every stock. SPIVA data shows better active performance rates in small-cap than large-cap.
Emerging markets
Less efficient markets, lower analyst coverage, greater information asymmetry, and corporate governance variations mean active management has a marginally stronger case in emerging markets. However, accessing true expertise in emerging markets is not easy, and many "emerging markets active funds" deliver neither alpha nor appropriate risk management.
Fixed income (bonds)
Bond index replication is technically more complex than equity index replication. Passive bond funds face structural challenges — bond indices are dominated by the largest borrowers (who may be the most indebted), bond indices change composition constantly as bonds mature and are issued, and liquidity in credit markets is genuinely lower than in equities. There is a credible case for active management in credit (high yield, investment grade corporate bonds) and in fixed income more broadly.
Private markets
By definition, you cannot passively invest in private equity, private credit, hedge funds, or infrastructure. Active selection and manager due diligence are inherent. The evidence on whether private markets deliver genuine risk-adjusted outperformance net of fees is contested, but it is at least a different conversation from public equity active vs passive.
Smart Beta: The Middle Ground
Smart beta (also called factor investing or strategic beta) occupies the space between pure passive and traditional active. Smart beta indices systematically tilt portfolios towards factors that academic research identifies as historically associated with excess returns:
Value: Companies trading at low multiples relative to book value or earnings Size: Smaller companies (which have historically delivered a premium over large caps) Momentum: Companies whose recent price trends continue in the short term Quality: Companies with strong balance sheets, consistent earnings, and high returns on equity Low volatility: Companies whose share prices exhibit lower volatility than the market
Smart beta products are usually cheaper than active funds (OCFs typically 0.20–0.50%) and fully transparent about their methodology. They capture factor premia systematically rather than relying on manager skill.
The evidence on factor investing is strong in academic research but more mixed in live products. Factor premia are real, but they are not consistent — value investing, for example, significantly underperformed growth from 2010–2020 before recovering strongly in 2022. Investors who abandoned value factors during their period of underperformance locked in losses.
Smart beta is best understood as a tool for systematically tilting a portfolio towards factors you believe in over a long horizon — not as a market-timing device.
Building an Efficient Passive Portfolio
A core passive portfolio for an international investor might look like:
Equities (60–80% of portfolio for a growth-oriented investor):
- Global equity index (MSCI World or MSCI ACWI — covers developed and emerging markets)
- Optional tilts: small-cap factor, emerging markets allocation if not fully captured
Fixed income (20–40%):
- Global aggregate bond index
- Or split between developed government bonds and investment-grade corporate bonds
- Consider short-duration tilts given rate uncertainty
Alternatives (0–20% for diversification):
- Global REIT index (real estate exposure)
- Commodities index (inflation hedge, diversification)
- Infrastructure index
This core can be implemented with four to eight ETFs, with annual rebalancing. Total cost of this approach: 0.10–0.25% per annum. It will outperform the average active fund over any 10-year period with very high probability.
The Adviser's Real Role in a Passive Portfolio
A common misconception: if you are investing passively, you do not need an adviser. This misunderstands what good advice delivers.
The adviser's role in a passive framework includes:
Asset allocation: The single biggest determinant of portfolio returns is how much goes into equities versus bonds versus alternatives versus cash. This is not a passive decision — it requires active judgement about your risk tolerance, time horizon, income needs, and tax position.
Tax-efficient structuring: The same index fund held in a SIPP, an ISA, a GIA, an offshore bond, or a QROPS has different after-tax returns. Maximising tax efficiency around a passive core is a high-value function.
Behavioural coaching: The evidence shows that retail investors in passive funds still systematically underperform the funds themselves because they buy after gains and sell after losses. An adviser who prevents one panic sale in a market downturn adds years of compounding to the portfolio. This is perhaps the highest-value function of all.
Rebalancing discipline: Portfolios drift from target allocations as markets move. Systematic rebalancing — selling what has risen, buying what has fallen — maintains your intended risk profile and, in practice, adds modest return through the rebalancing premium.
Holistic financial planning: Investments are one component of a financial plan. Pensions, insurance, estate planning, tax, and property all need to be coordinated. No algorithm does this.
The Bottom Line
Invest the bulk of your equity exposure in low-cost index funds. Use active management only where you have a specific, evidence-based reason to believe the market is genuinely less efficient (small cap, some credit, some emerging markets). Avoid active management in large-cap developed equity markets unless you can identify a manager with a genuine edge — which is very difficult to do in advance.
And do not confuse the passive investment decision with the broader financial planning question. Having an efficient portfolio at the core makes professional advice more — not less — valuable, because the adviser's energy goes into the decisions that truly matter rather than attempting to justify expensive fund selections.
How Global Investments Can Help
We build portfolios around evidence rather than product incentive. For most clients, that means a core of low-cost index exposure, sensible factor tilts where appropriate, tax-efficient structuring, and disciplined rebalancing — alongside the broader financial plan that determines what the portfolio is trying to achieve.
Contact us to discuss your investment approach.
The value of investments can fall as well as rise. Past performance is not a guide to future returns. This article is for informational purposes only and does not constitute regulated financial advice.
This article is for general information only and does not constitute financial, legal or tax advice. Rules, prices and regulations change; verify current requirements with a qualified adviser before acting.