Value investing — the practice of identifying and buying securities trading below their intrinsic worth — has intellectual roots stretching back to Benjamin Graham and David Dodd's 1934 "Security Analysis". The strategy achieved its greatest popular expression through Warren Buffett's Berkshire Hathaway and its academic formalisation through Fama and French's work — the 1992 paper documenting the value and size effects and the 1993 three-factor model, which identified the "HML" (high minus low book-to-market) factor as one of the key determinants of equity returns.
The decade from 2010 to 2020 was the most sustained and painful period of value underperformance on record, raising serious questions about whether the premium was a permanent fixture of markets or a temporary anomaly that arbitrage had eliminated. The partial value recovery of 2021–2024 reopened the debate. This guide sets out what the evidence actually shows and what it implies for portfolio construction.
The Academic Evidence for Value
The Fama-French HML factor — constructed by going long cheap stocks (high book-to-market ratio) and short expensive stocks (low book-to-market ratio) — has delivered positive average returns in US data going back to 1926. Extended internationally, similar premia appear in data from the UK, Europe, Japan, and many emerging markets, suggesting the effect is not a data-mining artefact specific to the US.
The theoretical arguments for why cheap stocks should deliver higher returns are well-developed:
Mean reversion of profitability. Corporate profitability tends to mean-revert: highly profitable companies attract competition, which erodes above-average margins; poorly performing companies face pressure to restructure, divest, or change management, which tends to improve returns. Cheap stocks are typically cheap because current profitability is depressed; investors who extrapolate current low profitability into the indefinite future will underprice the recovery.
Distress risk premium. Cheap stocks are disproportionately concentrated in financially fragile companies. The value premium may partially reflect genuine compensation for bearing elevated distress risk, rather than irrational investor behaviour.
Behavioural overreaction. Investors systematically overreact to good and bad news, pushing glamour stocks too high (feeding overvaluation) and distressed or out-of-favour stocks too low (feeding undervaluation). Contrarian investors who exploit these mispricings are rewarded when prices revert to fundamentals.
The Decade that Tested Faith: 2010–2020
Between 2010 and 2020, value investing experienced its worst sustained decade of relative underperformance against the broader market and against growth strategies in particular. The MSCI World Value Index underperformed the MSCI World Growth Index by approximately 6–8 percentage points annually over this period — an extraordinary and sustained reversal of the historical pattern.
Multiple explanations were offered:
Structural change in the economy. The rise of technology companies with business models built on network effects, software margins, and intangible assets — intellectual property, brand, data — produced a generation of highly profitable companies with low physical capital requirements. These companies screened as "expensive" on book-to-market and P/E ratios not because of irrational exuberance but because their genuine economic value was poorly captured by accounting book value.
Intangible asset distortion. Under IFRS and GAAP accounting rules, most internally generated intangible assets — research and development, brand development, software — are expensed immediately rather than capitalised on the balance sheet. A company like a pharmaceutical firm or a technology platform writes off its most valuable assets immediately, resulting in understated book value and an apparently high price-to-book ratio. The classic P/B screen misidentifies these companies as expensive when they may be fairly or cheaply priced relative to genuine economic value.
Ultra-low interest rates. The post-2008 regime of near-zero interest rates disproportionately benefited growth stocks by reducing the discount rate applied to distant future cash flows, increasing the present value of long-duration earnings streams. Value stocks — typically shorter-duration, producing more near-term cash flows — benefited less from duration extension.
The Value Recovery: 2021–2024
As interest rates rose sharply from 2022 onwards, the duration headwind for value stocks reversed. The energy sector, heavily represented in value indices and largely excluded from growth indices, delivered very strong returns in 2022. Financial stocks, a perennial value sector, benefited from wider net interest margins as rates rose.
The MSCI World Value Index substantially outperformed the MSCI World Growth Index in 2022 and continued to perform competitively in 2023 and 2024. This partial recovery did not erase the cumulative underperformance of the previous decade, but it was consistent with the theoretical prediction that value would benefit from a higher rate environment.
The episode illustrates a key characteristic of value investing: the premium, when it materialises, often does so in concentrated, uncomfortable bursts rather than steadily and continuously. Investors who abandoned value strategies at the end of the 2010s — precisely when the academic case was strongest given elevated valuation spreads — missed the recovery.
Valuation Metrics Beyond Price-to-Book
While book-to-market was the original Fama-French signal, subsequent research has identified several valuation metrics with stronger predictive power, particularly in the context of the intangible asset distortion problem:
Price-to-Earnings (P/E) and Cyclically Adjusted P/E (CAPE). Earnings are less susceptible to the intangible asset distortion than book value, though they can be manipulated through accounting choices and are volatile across the cycle. CAPE smooths earnings over 10 years to reduce cyclicality.
EV/EBITDA (Enterprise Value to Earnings Before Interest, Taxes, Depreciation and Amortisation). Avoids some of the capital structure distortion in P/E ratios and is widely used in professional valuation for comparable company analysis.
Free Cash Flow Yield. The ratio of free cash flow to enterprise value or market capitalisation captures the actual cash generation ability of the business rather than accounting earnings, which are subject to various non-cash adjustments.
Price-to-Sales. Less susceptible to earnings manipulation and useful in early-stage or loss-making companies, though it ignores margin differences between businesses.
Modern value strategies increasingly use composite scores across multiple valuation metrics to produce a more robust cheap/expensive classification than any single metric can provide.
Implementing a Value Tilt
For investors who accept the case for a strategic value allocation, implementation options range from the simple to the sophisticated:
MSCI World Value ETF (e.g., iShares MSCI World Value Factor UCITS ETF): Provides broad developed-market value exposure using a multi-metric composite screen. Ongoing charge approximately 0.30%.
Vanguard Global Value Factor UCITS ETF: Provides similar exposure at competitive cost.
Dimensional Fund Advisors (DFA) funds: DFA has implemented academic value strategies since the early 1980s, working directly with Fama and French. Their funds tilt systematically towards value and small-cap exposure. Available through qualified advisers.
Direct stock selection: For investors with the research capacity and risk appetite, concentrated portfolios of genuinely cheap stocks (quantitatively or qualitatively identified) have historically generated the strongest value premia. However, the tracking error relative to market indices is high and requires genuine commitment to the strategy through extended periods of underperformance.
Factor Timing vs Strategic Allocation
One persistent temptation with factor investing is to increase value exposure when valuations appear wide (when value stocks look particularly cheap relative to growth) and reduce it when spreads are narrow. The evidence on factor timing is generally discouraging: the metrics used to predict factor premia have low signal-to-noise ratios at short horizons, and investors who attempt to time factors typically underperform static allocations.
The practical recommendation from academic research is to establish a strategic factor tilt — a permanent, deliberate overweight to value, sized according to the investor's time horizon and risk tolerance — and maintain it consistently through the inevitable periods of underperformance.
Compliance and Regulatory Note
Value investing strategies involve the risk of extended periods of underperformance relative to the broad market. Investment in individual value stocks carries concentration risk and the risk of permanent capital loss if individual company situations deteriorate. Factor premia are not guaranteed and may not materialise over any specific time horizon. Past performance is not a reliable indicator of future results. This article is for information only and does not constitute personal financial advice.
How Global Investments Can Help
Incorporating factor tilts — including value — into a portfolio requires conviction, patience, and the structural ability to tolerate tracking error over multi-year periods. These are not characteristics that come naturally to most investors working in isolation. At Global Investments, we work with clients to establish explicit factor policies, implement them at appropriate cost through ETF and fund vehicles, and provide the ongoing context that prevents reactive abandonment of well-founded strategies during periods of underperformance. Contact our team to discuss whether a value tilt is appropriate within your broader portfolio framework.
This guide is for general information only and does not constitute financial advice or a personal recommendation. The value of investments can fall as well as rise and you may get back less than you invest. Past performance is not a guide to future returns. Tax rules, investment regulations, and the availability of specific investment vehicles change — always verify current rules and seek advice from a qualified independent financial adviser before making any investment decisions.