2024 by Sector
Sector dispersion was wide in 2024. Four sectors returned more than 20% on the year:
- Technology
- Communication services
- Consumer discretionary
- Financials
Three sectors were essentially flat:
- Health care
- Materials
- Real estate
Technology's contribution is the headline number: the sector added roughly $4.63 trillion in market capitalization in a single year. Over the last five and ten years, technology has contributed approximately $11.3 trillion and $13.6 trillion in market cap respectively — a concentration of value creation that has no modern precedent.
Industry-Level Dispersion
Drilling into the 93 industry groupings, the split between new- and old-economy names widened further. Semiconductors and auto & truck posted strong numbers. Traditional industrials — steel, chemicals, rubber and tires — struggled. Green energy also landed among the worst performers, likely reflecting softening flows into impact and ESG-labeled strategies.
The Vanishing Small-Cap Premium
The textbook story — that smaller-cap stocks deliver higher risk-adjusted returns over time — has broken down over the last two decades. Looking at decile-sorted market cap returns, there is no clean monotonic relationship between size and return. Over the last 20 years specifically, small-cap stocks have underperformed large-caps by roughly 4 to 4.5% annually.
Concentration among the largest companies is now extreme:
- The top 1% of stocks accounted for about 74% of total market cap growth
- The top 10% accounted for roughly 94% of total market cap growth
That isn't a market where a size premium can survive.
The Value Premium, Also Fading
The value factor — long price-to-book, short high price-to-book — has also spent more time negative than positive over the last two decades. In 2024, high price-to-book names led, and low price-to-book names lagged. Damodaran attributes the erosion to three forces:
- Over-reliance on price-to-book as a proxy for "value," particularly for asset-light companies where book value means little
- A strengthening momentum factor that dominates mean reversion
- Globalization and disruption that slow or prevent mean reversion at the firm level
What This Means for Investors and Operators
For investors: the case for passive large-cap exposure over active stock picking keeps getting stronger. Value-oriented strategies need to replace simple price-to-book screens with more substantive measures of intrinsic value.
For traders: momentum works until it doesn't. Position sizing and stop discipline matter more when markets are concentrated and momentum-driven.
For companies: stock price is an unreliable scorecard in momentum regimes. Operating decisions driven by short-term price reactions can destroy long-term value.
For regulators: concentration and momentum amplify systemic risk and make individual investor protection harder.
Bottom Line
Large-cap concentration, dormant small-cap and value premiums, and momentum dominance are structural features of the current US equity market, not cyclical quirks. Damodaran's view is that the small-cap and value premiums are unlikely to return on any sustained basis — a hard conclusion for strategies built on their historical presence.