NEW YORK, September 29 — The rise of passive investing, driven by index funds and exchange-traded funds (ETFs), has transformed global financial markets over the past four decades, accumulating more than $13 trillion in assets under management globally as of 2023, according to data from the Investment Company Institute and ETFGI. The movement began in 1976 with the launch of the first index mutual fund by Vanguard Group, spearheaded by its founder John C. Bogle.
Bogle’s vision was clear: low-cost, broad-market exposure as a way to outperform most actively managed funds over time. The strategy worked, and it laid the groundwork for a seismic shift in how investors allocate capital.
The first ETF, the SPDR S&P 500 ETF Trust (SPY), was introduced in 1993 by State Street Global Advisors. This innovation enabled intraday trading of index exposure and accelerated adoption among institutional and retail investors. By 2020, passive funds surpassed active funds in U.S. equity assets for the first time, marking a structural shift in how capital flows in financial markets.
The dominance of passive investing has significantly influenced corporate governance. BlackRock, Vanguard, and State Street — the largest index fund providers — collectively hold substantial voting power in thousands of corporations.
They often rank among the top shareholders in S&P 500 companies. Their stewardship practices, particularly on environmental, social, and governance (ESG) issues, have drawn increasing scrutiny from regulators and lawmakers, including U.S. Senators who have questioned the concentration of shareholder influence in a few firms. Despite criticism, studies from institutions like the World Bank and OECD have shown that passive investing has lowered average investment costs for retail investors.
Expense ratios for broad market index funds have fallen below 0.05% in many cases, compared to historical averages of over 0.75% for actively managed funds. This reduction has made investing more accessible, particularly for small and medium-sized investors. The trend has also affected market efficiency.
Some analysts note reduced price discovery in less-liquid stocks due to index-driven flows, while others argue it has improved market accessibility and diversification. The growth of passive investing has been fueled by technological advances, lower trading costs, and investor preference for simplicity and transparency, particularly following the 2008 financial crisis, which eroded trust in active management.
As of 2023, over 50% of U.S. equity fund assets were held in passive vehicles, a dramatic increase from less than 5% in the early 1990s. This underscores the enduring impact of Bogle’s vision on global investing behavior and market structure. The mechanics here are clear — but the catch is, the long-term implications of such concentrated influence remain to be seen.
