Value investing, as codified by Benjamin Graham in the 1930s and popularised through the Berkshire Hathaway example, is the oldest disciplined framework in modern equity analysis. Its core idea is straightforward: buy securities at a meaningful discount to their intrinsic value, and let time close the gap. For roughly seventy years, the record of value strategies was one of consistent long-term outperformance. Since 2010, that record has been challenged in ways that deserve careful examination.
The core framework
Graham's framework, refined by generations of practitioners, has three components. First, an estimate of a security's intrinsic value — its worth to a rational owner given the cash flows it will generate over its remaining life. Second, a comparison of that intrinsic value to the market price. Third, a margin of safety — a discount large enough to protect the investor against errors in the estimate and unfavourable surprises in the underlying business.
The "value" of value investing was never merely "buy things at low multiples." It was the discipline of insisting on a margin between price and estimated worth. Low multiples were often the proxy through which that margin was found, but the framework never confined itself to any particular metric.
The academic evidence, through 2010
Through the 1990s and early 2000s, the empirical evidence for value strategies was overwhelming. Portfolios of stocks with low price-to-book ratios outperformed portfolios of high price-to-book ratios by roughly 4–5% per year in the US and internationally. The Fama-French three-factor model formalised value as one of three factors driving cross-sectional stock returns, alongside market beta and size.
The premium was documented across countries, time periods, and rebalancing frequencies. It survived out-of-sample testing after publication, which is unusual for anomalies. It was, for decades, one of the most robust findings in empirical finance.
The 2010–2020 collapse
The period from roughly 2010 through 2020 saw value strategies underperform growth strategies by margins unlike anything in the prior sixty years. Cumulative returns from cheap stocks (low price-to-book) trailed those from expensive stocks (high price-to-book) by 6–7% per year on average — a persistent, decade-long reversal of the historical pattern.
This is not "value stopped working for a year." It was a decade of consistent, wide, statistically significant underperformance. Any framework that failed for a decade deserves serious re-examination, and the value factor's failure has been the subject of intense academic and practical debate.
The proposed explanations
Three broad explanations are advanced.
The accounting-obsolescence view. Modern intangible-heavy businesses (software, brands, network effects) have much of their value in items that book accounting understates or omits entirely. A company like Alphabet has enormous economic value tied up in intangibles that appear on its balance sheet only through the residual of acquisitions. If price-to-book is the value screener, Alphabet screens as expensive purely because the accounting understates its book. Adjusting for capitalised intangibles restores much of the traditional value premium during the 2010s, according to several academic analyses.
The interest-rate view. Ultra-low real interest rates disproportionately favoured long-duration cash flows — companies whose value is dominated by earnings ten and twenty years out. Growth companies fit that description; value companies typically have shorter-duration cash flow profiles. When rates normalise, the tailwind reverses, which happened to some degree in 2022.
The crowded-trade view. Value strategies became so widely known and mechanically implemented that the premium was arbitraged away. This is a familiar argument for many "dead" anomalies, and it has some support in the concentration of quantitative value strategies during the 2000s. Whether the crowding was sufficient to eliminate the premium entirely is debated.
Some combination of all three is probably closest to correct.
The post-2022 recovery
The value factor's performance recovered materially in 2022 and 2023, and has been mixed through 2024–2026. The recovery does not restore the decade-long deficit — cheap stocks have not caught up to expensive ones over the full period since 2010 — but it does suggest the factor is not entirely broken.
The frame that emerges is not "value works" or "value is dead." It is "value's performance has been more regime-dependent than the pre-2010 record suggested, and the regime dependence is now being priced in as a risk factor of its own."
What survives the debate
Three ideas from the value tradition survive even the harshest interpretation of the 2010s data.
The margin-of-safety discipline. Insisting on a discount between estimated worth and market price is a general risk management principle, not a strategy that lives or dies with the factor. It remains useful in any framework.
Skepticism of dominant narratives. Value investing has always been contrarian by disposition — willing to hold securities that most participants view as unattractive. This disposition is a partial defence against confirmation bias and momentum-chasing, and it remains valuable regardless of whether the factor pays.
Balance-sheet awareness. Reading company financial statements carefully — including the parts that traditional accounting understates — is a durable skill. Whether the resulting framework is called "value" or something else, the analytical discipline persists.
What has changed
The pure mechanical version of value (buy low price-to-book, sell high price-to-book, rebalance) has become substantially less effective and requires modification to work. Adjusted-book and quality-adjusted variants have performed better than the raw form. The idea that "value" is a single reliable factor extractable by simple metrics may not survive the modern period intact.
The rule to internalise
Value investing as a framework — insist on a margin between price and estimated worth, and be skeptical of dominant narratives — remains durable. Value investing as a specific mechanical strategy of buying-low-multiples has entered a period of much more uncertain performance. The distinction is worth carrying, because collapsing them together produces either false confidence or false despair.
Educational content only. Not investment advice.