Evidence-based investing, built on decades of research.
Founded 1981 · $600B+ AUM · 5 Nobel Laureates
Who Dimensional Are
Dimensional Fund Advisors was founded in 1981 by David Booth and Rex Sinquefield, both students of Nobel laureate Eugene Fama at the University of Chicago. They had a simple but powerful idea: take decades of academic research about how markets actually work and build investment strategies around it.
Most fund managers try to beat the market by picking stocks or timing when to buy and sell. Dimensional took a different approach. They asked: what does the evidence tell us about which types of companies tend to deliver higher returns over time? The answer: smaller companies, cheaper companies (value), and more profitable companies.
For over 40 years, Dimensional has stayed true to this research-driven approach. They don't forecast. They don't guess. They don't chase trends. They simply capture the returns that markets offer to patient, disciplined investors.
Today, Dimensional manages over $600 billion globally and works exclusively with institutional investors and selected financial advisers. Five Nobel Prize winners in economics have served on their board or as advisors, including Eugene Fama (2013 Nobel laureate) and Kenneth French, whose research on factor investing forms the foundation of modern portfolio theory.
"They're not trying to be clever. They're trying to be systematic. Their portfolios are built on evidence, not emotion. And after 40+ years, the results speak for themselves."
Why We Include Dimensional in Our Portfolios
Institutional-Grade Investing Since 1981
Grounded in Academic Research
Dimensional grew out of the University of Chicago—the birthplace of modern finance. Their approach is based on decades of peer-reviewed research, not marketing gimmicks or star managers.
The research shows that certain characteristics of companies—being small, being cheap relative to fundamentals (value), and being profitable—have historically delivered higher expected returns over the long run.
Logical, Rational, Evidence-Based
This isn't about getting lucky with a few stock picks. It's about systematically capturing premiums that exist because they represent real economic risks that investors need to be compensated for taking.
Small companies are riskier than large companies. Distressed companies (value) carry more uncertainty than stable growth companies. That risk requires compensation—and over time, markets have delivered it.
Better Risk Management
Tilting toward small and value stocks isn't just about higher expected returns. It's also about reducing the risk of a "lost decade" when one narrow slice of the market underperforms for an extended period.
Why Diversification Across Factors Matters
It's not just about the average return you receive over 10 or 20 years. It's about the sequence of those returns—especially if you're withdrawing money during retirement.
Historical "Lost Decades" for Large-Cap Growth:
1929-1949
20 years
1963-1981
18 years
2000-2009
Nearly zero return
During each of these periods, small-cap and value stocks significantly outperformed.
Scenario A: Concentrated Portfolio
100% large-cap tech
Four negative years, then +40% recovery
Result: Capital destruction despite recovery
Scenario B: Diversified Factors
Spread across large/small/value
Steady positive returns throughout
Result: Reliable compounding
"This is why we tilt toward small and value: it's not just about higher returns, it's about smoother, more reliable returns when you need them most."
What the Strategy Is
Small, Value, and Profitability Tilts
The Size Premium
Smaller companies have historically delivered higher returns than larger companies over the long term. This makes sense: small companies are riskier, less stable, and have higher failure rates. Investors demand compensation for that risk.
Dimensional's approach:
Overweight small-cap stocks globally whilst maintaining broad diversification (thousands of holdings, not a handful of bets).
The Value Premium
"Value" stocks are companies trading at lower prices relative to their fundamentals. These tend to be out-of-favour, distressed, or cyclical businesses. Historically, value stocks have outperformed growth stocks over the long run.
Dimensional's approach:
Tilt toward cheaper stocks whilst avoiding the most distressed companies (maintaining quality filters).
The Profitability Premium
Not all value stocks are created equal. Dimensional adds a profitability filter: they favour value companies that are actually making money. This approach—sometimes called "quality value"—captures the value premium whilst avoiding value traps.
Dimensional's approach:
Favour profitable value companies to capture premium whilst maintaining quality.
"If everyone knows about these premiums, why haven't they been arbitraged away?"
They require patience.
Small and value stocks can underperform for years (even decades). Most investors lack the discipline to stick with them.
They involve career risk.
Professional fund managers get fired for underperforming over 3-5 years, even if the long-term evidence supports their approach.
They're structurally uncomfortable.
Small and value stocks tend to do well during periods when large-cap growth crashes—meaning you have to hold "boring" stocks whilst your neighbour brags about their tech portfolio.
"This discomfort is precisely why the premium exists. If it were easy, it wouldn't pay."
Who This Strategy Suits
The Ideal Dimensional Investor
This approach is not for everyone. It's specifically designed for:
Long-term investors (10+ years)
Factor premiums play out over decades, not quarters. If you need your money in 2-3 years, this isn't the right strategy.
Disciplined investors who can stay the course
Small and value stocks will underperform during certain periods. You need to be comfortable holding investments that might look "wrong" for 3-5 years.
Investors who value risk management
If you're worried about concentration risk (being too heavily invested in a narrow slice of the market like US tech), Dimensional's global, multi-factor diversification provides genuine protection.
Retirees and those drawing income
The smoother return profile from diversification across size/value/profitability reduces sequence-of-returns risk—the biggest threat to retirement portfolios.
Investors happy to trade top-10% upside for top-5% consistency
With Dimensional, you give up the chance of beating the market by 20% in any single year. But you significantly increase your odds of being in the top 5% of performers over 10-20 years.
The Evidence: Active Funds vs. Benchmarks (10+ Years)
"You won't pick winners every year. But history shows simple factors outperform 97% of pros long-term. Let's build your edge."
📖 Sources & Research
S&P SPIVA (2024): 92–97% of US equity funds lag their benchmarks over 10–15 year periods. View Report →
Fama & French (2010): Fewer than 2% of mutual funds demonstrate genuine skill after costs. Read Full Paper →
Why It's Different
vs. Index Managers (like Vanguard)
Similarities:
- • Low costs (though slightly higher than Vanguard)
- • Broad diversification
- • No stock picking or market timing
1. Factor Tilts
Vanguard tracks market-cap weighted indices. Dimensional tilts toward small, value, and profitable companies within those indices.
2. Implementation Matters
Dimensional uses "patient trading"—they don't rush to buy or sell when index constituents change. This avoids the "front-running" problem that plagues traditional index funds.
3. Research-Driven Adjustments
Dimensional continuously refines their approach based on new academic research. They're not slavishly following an index.
Cost Comparison:
"The cheapest ETF is not necessarily the best one. Costs matter, but implementation matters more."
vs. Active Managers
Similarities:
- • Daily trading flexibility
- • Active portfolio decisions
1. No Forecasting
Active managers try to predict which stocks will outperform. Dimensional doesn't. They simply capture the premiums that research shows exist.
2. Systematic, Not Discretionary
Active managers rely on "skill" (picking winners). Dimensional relies on discipline (owning the right types of companies and staying the course).
3. Much Lower Costs
Active managers charge 1-2%+ per year. Dimensional charges 0.25-0.45%.
4. Better Odds
Real-World Performance
October 2011 – November 2025
We've included performance data for two Dimensional strategies over 14+ years of real-world investing.
60/40 Balanced Fund
£284,000
Growth of £100,000
Annualised Return
7.66%
10-Year Return
7.28%
Standard Deviation
7.52%
Best 1-Year
+28.46%
Worst 1-Year
-8.70%
- • Survived Brexit, COVID-19, and 2022 bear market
- • Lower volatility than pure equity portfolios
- • Net of DFA fees
World Equity Fund
£460,000
Growth of £100,000
Annualised Return
11.37%
10-Year Return
11.19%
Standard Deviation
12.01%
Best 1-Year
+49.04%
Worst 1-Year
-15.05%
- • Outperformed most actively managed global equity funds
- • Captured small and value premiums across multiple markets
- • Net of DFA fees
What This Means:
These are not hypothetical returns. These are actual, real-world results that UK investors received. And critically: these returns are net of Dimensional's fees. They don't include adviser fees or platform costs—but as most of our clients know, we annually save them significantly more in taxes than our fees cost, providing strong ROI on our comprehensive wealth planning service.
Why We Use Dimensional
Evidence-based investing that works in the real world
40+ years of track record, $600B+ under management, backed by five Nobel laureates.
Better risk management for wealth preservation
Diversification across size, value, and profitability reduces the risk of lost decades and sequence-of-returns problems.
Disciplined implementation that captures premiums efficiently
Higher expected returns without excessive costs or unnecessary risks.
"This isn't about being clever. It's about being systematic, patient, and grounded in what actually works."
Dimensional funds are only available through selected financial advisers. Quantum is an approved Dimensional partner.
Past performance is not a reliable indicator of future results. The value of investments can go down as well as up. You may get back less than you invested. This information is for UK residents only and does not constitute financial advice. Dimensional Fund Advisors is a separate entity from Quantum. Performance data shown represents past performance of Dimensional funds and is not a guarantee of future results.
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