The financial landscape has undergone significant transformations over the past century and a quarter. According to the 2025 edition of the Global Investment Returns Yearbook, published by UBS in collaboration with academics from the London Business School and Cambridge University, long-term equity returns have consistently outpaced other asset classes across various markets.
Evolving Market Dynamics
In 1900, the industrial composition of stock markets was markedly different from today. Approximately 80% of the value of U.S. publicly traded companies was concentrated in industries that have since diminished or vanished entirely; in the U.K., this figure was 65%.
Sectors such as railroads dominated the market during that era. Fast forward to 2025, and industries like technology, healthcare, and modern energy sectors—which were either non-existent or in their infancy at the turn of the 20th century—now represent substantial portions of market value: 63% in the U.S. and 44% in the U.K.
Equities’ Superior Performance
A key takeaway from the Yearbook is the remarkable performance of equities over the long term. In every country analyzed, equities have outperformed bonds, treasury bills, and inflation. For instance, a $1 investment in U.S. equities in 1900 would have grown to $107,409 by the end of 2024 in nominal terms.
This underscores the potential of equities to deliver substantial returns over extended periods.
Rising Market Concentration
The report also highlights a growing concern: market concentration. While the global equity market was relatively balanced in 1900, the U.S. now accounts for 64% of world capitalization. This shift is largely attributed to the outperformance of major technology stocks.
The current concentration level in the U.S. market is the highest it has been in 92 years, raising questions about diversification and systemic risk.
The Importance of Diversification
Despite increased globalization leading to more synchronized markets, the benefits of international diversification remain significant. The Yearbook suggests that diversification can help manage volatility and reduce risks. For investors in developed markets, emerging markets continue to offer better diversification prospects compared to other developed markets.
This reinforces the strategy of spreading investments across various geographies and asset classes to mitigate potential downturns in any single market.
Inflation’s Impact on Returns
Inflation is identified as a critical factor influencing long-term returns. The analysis indicates that asset returns have been lower during periods of rising interest rates and higher during cycles of monetary easing. Similarly, real returns have been subdued during high inflation periods and more robust during low inflation times.
Among the few effective hedges against inflation, gold and commodities stand out. Since 1972, gold price fluctuations have shown a positive correlation of 0.34 with inflation, making it a valuable asset for preserving purchasing power.
Expert Perspectives
Dan Dowd, Head of Global Research at UBS Investment Bank, expressed satisfaction with the collaborative effort in presenting the 2025 Yearbook, noting that with 125 years of data, it provides clients with a valuable framework for addressing contemporary challenges through the lens of financial history.
Mark Haefele, Chief Investment Officer of UBS Global Wealth Management, emphasized that the Yearbook helps in understanding the long-term effects of principles such as diversification, asset allocation, and the relationship between risk and reward. He reiterated the importance of maintaining a long-term perspective and the value of a disciplined investment approach.
Professor Paul Marsh of the London Business School observed that while 21st-century equity returns have been lower than those in the 20th century, fixed income returns have been higher.
Nonetheless, equities continue to outperform inflation, fixed income, and cash. The global stock market has delivered an annualized real return of 3.5% and a 4.3% premium over cash, affirming the enduring validity of the risk and return paradigm in the 21st century.
Conclusion
The 2025 Global Investment Returns Yearbook offers a comprehensive analysis of financial markets over the past 125 years. Its findings highlight the enduring strength of equities, the evolving nature of market sectors, the challenges posed by market concentration, the benefits of diversification, and the significant impact of inflation on investment returns.
For investors, these insights underscore the importance of a long-term, diversified, and informed approach to asset allocation.
