US Equities A Handful Of Stocks Dominate Century Gains

For nearly a century, American markets have produced 91 trillion dollars of wealth for shareholders. Yet, this value creation relies almost entirely on a handful of companies. A study conducted by economist Hendrik Bessembinder on nearly 30,000 listed stocks between 1926 and 2025 shows that only 46 companies concentrate half of the gains generated on Wall Street. Behind the historical performances of American indices, the market reality appears much more unbalanced than it seems.

46 Companies Have Captured Most of Wall Street’s Gains

The study reveals that the American Stock Market generated about 91 trillion dollars of net wealth for shareholders in one century. Yet, “only forty-six companies grabbed half of the net wealth created for shareholders”.

This spectacular concentration overturns the idea of a market collectively supported by thousands of companies. In fact, a handful of companies captured an overwhelming share of the overall performance. Hendrik Bessembinder also reminds “that about 60% of stocks, over their stock market lifetime, underperformed short-term government bonds”. In other words, the majority of listed securities didn’t even outperform investments considered low risk.

The figures presented by the study illustrate the scale of the phenomenon :

• 91 trillion dollars of net wealth were created by American stocks between 1926 and 2025 ;
• Only 46 companies concentrate half of this value creation ;
• 60 % of American stocks have underperformed Treasury bonds over their listing duration ;
• 1 dollar invested in American stocks would have become nearly 15,000 dollars, compared to only 25 dollars for short-term Treasury bonds ;
• Groups like Altria or IBM are among the main historical creators of stock market wealth.

This aggregated performance, however, masks a massive asymmetry between winners and losers. The observed dynamic largely relies on companies able to sustainably maintain their economic dominance through economies of scale, monopolistic positions, or a technological lead difficult to catch up with.

Why This Study Weakens Active Management and Strengthens ETFs ?

The study reveals the structural limits of active management. Since most of the stock market performance comes from an extremely small number of stocks, missing these few winners becomes immediately penalizing for fund managers. The slightest underexposure to these giants is immediately paid for in relative performance.

This imbalance partly explains why many active funds fail to sustainably outperform the major stock indices. SPIVA data show that about 80 % of large-cap American funds underperform the S&P 500 over one year, while more than 85 % fail to beat it over ten to fifteen years.

This reality mechanically feeds the rise of ETFs and passive strategies. Market-cap weighted indices automatically increase exposure to dominant companies as they gain value. Investors thus capture the performances of big winners without having to identify them in advance. This logic increasingly resembles some behaviors observed in crypto markets, where a few assets concentrate the bulk of flows and performances while many tokens gradually disappear from institutional investors’ circulation.

The publication of this study reignites the debate around the growing concentration of global financial markets. Between the dominance of tech giants, the massive rise of ETFs, and the persistent difficulties of managers to beat benchmark indices, the entire traditional stock selection mechanism becomes fragile. For stock market investors, the challenge is no longer only to identify the next gem before the market, but especially to maintain sufficient exposure to the few companies capable of sustainably capturing global value creation.

Luc Jose A.

Diplômé de Sciences Po Toulouse et titulaire d’une certification consultant blockchain délivrée par Alyra, j’ai rejoint l’aventure Cointribune en 2019.
Convaincu du potentiel de la blockchain pour transformer de nombreux secteurs de l’économie, j’ai pris l’engagement de sensibiliser et d’informer le grand public sur cet écosystème en constante évolution. Mon objectif est de permettre à chacun de mieux comprendre la blockchain et de saisir les opportunités qu’elle offre. Je m’efforce chaque jour de fournir une analyse objective de l’actualité, de décrypter les tendances du marché, de relayer les dernières innovations technologiques et de mettre en perspective les enjeux économiques et sociétaux de cette révolution en marche.

DISCLAIMER

The views, thoughts, and opinions expressed in this article belong solely to the author, and should not be taken as investment advice. Do your own research before taking any investment decisions.