Why investing in the world’s most successful industries often leads to the market’s most disappointing returns.
The Mirage of the Winning Sector
In 1900, the stock market was dominated by rail companies and banks. Today, technology stocks command the lion’s share of the U.S. market. This evolution is the natural byproduct of creative destruction, the process by which new innovations displace the old to move the economy forward. For many investors, the logical conclusion is to identify the next dominant industry and bet heavily on it. If technology is the future, the thinking goes, one should own as much of it as possible.
The counterintuitive reality is that winning industries rarely deliver winning stock returns over the long term. While it seems easy to pick winners in hindsight—especially after a decade of tech dominance—history suggests that today’s leaders are tomorrow’s laggards. From 1934 to 2024, the top-performing industry of any given decade—whether it was aircraft in the 50s, healthcare in the 80s, or coal in the 2000s—almost invariably trailed the market in the following decade. On average, these former champions underperformed the broader market by 2.6% annualized in the ten years following their peak.
The Price of High Expectations
The primary obstacle to profiting from a "winning" industry is asset pricing. Stocks are not just claims on a company’s future; they are claims on future earnings at a specific price. When an industry is universally recognized as the future of the economy, that optimism is already baked into the stock price. For an investor to earn abnormal returns, the industry’s performance must not only be good; it must be better than the already lofty expectations of the market.
This creates a disconnect between economic outcomes and investment returns. It may be obvious that an industry is becoming more economically important, but if the entry price is too high, the expected return is naturally lower. Furthermore, investors often overlook the impact of earnings dilution. A sector can grow its aggregate earnings tenfold, but if companies are aggressively issuing new shares to finance that growth or to compete with new entrants, the per-share earnings growth—which is what actually drives stock prices—will lag far behind. The fastest-growing industries attract the most competition, which often erodes the very profits investors are chasing.
The Performance Chasing Trap
Beyond the mechanics of the market, human behavior plays a destructive role in industry betting. The tendency to buy high and sell low is particularly acute in sector-specific investing. Morningstar’s 2024 "Mind the Gap" report highlights that sector equity funds have the largest gap between fund returns and actual investor returns, at negative 2.6% per year over a decade. This means the average investor in these funds earns significantly less than the fund’s stated performance because they tend to pile in after a period of high returns and exit after a downturn.
The NASDAQ provides a stark historical example. Research suggests an investor return gap of 5.3% for the tech-heavy index, indicating that massive amounts of capital were poured into technology stocks at exactly the worst possible moments. When an industry becomes "exciting," it attracts speculative capital that drives valuations to unsustainable levels, setting the stage for poor subsequent performance. This behavioral friction makes narrow industry bets a high-risk strategy for the average portfolio.
Boring is Often Better
If we look at U.S. industry returns from 1969 through 2024, the best performers were not the revolutionary sectors like software or electronics. Instead, the top spots were occupied by tobacco, entertainment, and defense. These "boring" or even stigmatized industries often trade at lower relative valuations because they lack the glamour that drives up prices in the tech sector. Because expectations are lower, these companies have a lower hurdle to clear to provide a positive surprise to the market.
A fascinating study of the original S&P 500 companies from 1957 found that a portfolio of the original stocks actually outperformed the updated index. The reason is that companies are typically added to the index when investor demand and valuations are at their peak, and removed when they are unloved and cheap. Tesla’s addition to the S&P 500 in 2020 serves as a modern cautionary tale: added after a meteoric rise in valuation, it has since underperformed the index by nearly 6% annualized. The trend is consistent—additions to major indices tend to underperform deletions in the year following the change.
A Strategy for the Rational Investor
The evidence suggests that betting on industries is a losing game for most. Not only is it difficult to predict which industry will lead the next decade, but the very act of concentrating in a single sector introduces "uncompensated risk"—risk that doesn't necessarily come with a higher expected return. Most industries actually underperform the market over the long haul; in one database of 49 U.S. industries, 32 trailed the market by an average of more than 2% per year.
For those seeking higher expected returns, the solution is not to pick the "right" industry, but to maintain broad diversification while tilting toward stocks with higher expected returns (such as those with lower valuations) within every industry. This approach captures the benefits of value investing without the idiosyncratic danger of industry concentration. By avoiding the temptation to chase the latest technological revolution, investors can protect themselves from the high prices and inevitable disappointments that follow the world's most exciting industries.