1976 was a memorable year. America celebrated its bicentennial, a little company called Apple* was founded, and NASA's Viking 1 successfully touched down on Mars.1 And despite those landmark moments, one milestone from that year has arguably had a bigger impact on the world… the index fund.
And on its 50th birthday, we celebrate all that came with John “Jack” Bogle’s simple, and sometimes controversial, idea. Because few, if any, innovations have done more to help ordinary investors save for major goals, retire comfortably, and build long-term wealth than the index fund.
Before index funds, the investing world looked, well, different.
Success was thought to come from picking the right stocks at the right time, and Wall Street built an entire industry around that belief. The better the stock picker, the thinking went, the higher the returns – and the higher the fees investors were willing to pay.
But even then, stock picking had a few critical shortcomings.
For one, there were the fees. With annual expenses as high as 2%, active mutual funds had to clear a steep hurdle just to keep pace with the market. It didn’t help that stock picking wasn’t, and still isn’t, exactly as easy as picking a ripe fruit at the grocery store. There’s no squeeze or visual test you can apply to Apple that you could to, say, an apple. If all that weren’t enough, investors then placed a significant amount of trust and money in a professional manager to do well by them.
Because the performance often didn't justify the fees, Jack Bogle saw an injustice that needed to be fixed. And so, like any superhero, he jumped into action. Instead of searching for the next great company, he focused on how investors could benefit from investing in all the great companies in the market in an affordable, diversified way.
Inspired by that philosophy, he combined a broad market index with the structure of a mutual fund, creating an entirely new investment vehicle called “the index fund,” a legacy that lives on in the Vanguard 500 Index Fund Admiral Shares (VFIAX).2
The thought behind the index fund was simple: efficient markets made consistent outperformance extraordinarily difficult over long periods. Combining broad ownership and low costs were more effective ways to diversify and build wealth over the long-term. Funny how not much has changed there.
When Vanguard launched its First Index Investment Trust in 1976, critics quickly dismissed the concept. Some even nicknamed it "Bogle's Folly," believing investors would always prefer paying professionals to search for market-beating returns.
Bogle hoped to raise between $50 million and $150 million during the initial offering. Instead, the fund attracted just over $11 million.
Years later, Bogle himself described the launch as "an abject failure."2 History ultimately delivered a much different verdict, however, as investors increasingly embraced indexing. The lower costs, broad diversification, and strong long-term performance proved compelling enough to attract attention.
Today, index mutual funds and ETFs collectively hold approximately $21.82 trillion in assets, surpassing the roughly $18.75 trillion invested in actively managed funds.3 Individual investors, retirement plans, financial advisors, pension funds, and institutions have all embraced indexing as a foundational investment strategy.
Bogle's philosophy proved to be transformative to the investment industry.
Economist Paul Samuelson, the first American recipient of the Nobel Prize in Economic Sciences, even compared the creation of the index fund to "the equivalent of the invention of the wheel and the alphabet."2
One of the most influential developments to follow the index fund was the exchange-traded fund, better known as the ETF.
Created in the early 90s, an ETF is similar to a mutual fund, with a few important distinctions. Both provide diversified exposure through a single investment. While pricing of mutual funds only happens once a day after the market closes, ETFs are priced and traded throughout the day like individual stocks.
Beyond their convenience, ETFs also offer greater transparency than mutual funds, allowing investors to see exactly what they own on any given day. They provide an easy, low-cost way to invest in the broader market while offering added benefits like liquidity and general tax efficiency.
Over time, this has laid the foundation for an entirely new generation of investment solutions.
Passive ETFs generally track a specific market index, such as the S&P 500, giving investors traditional market-cap weighted exposure. Their emphasis on diversification, low costs, and long-term investing has made passive ETFs one of the fastest-growing investment vehicles in the world, and a staple of some of our offerings at Motley Fool Asset Management.
Just take the Motley Fool 100 Index ETF (TMFC), for example. It’s a Motley Fool Asset Management ETF that tracks the Fool 100 Index, which consists of the 100 largest and most liquid U.S. companies that have been recommended by the analysts at The Motley Fool, LLC and packages it into an efficient, passive index wrapper.
Active ETFs retain the ETF structure while placing investment decisions in the hands of professional portfolio managers. Rather than follow an index, managers actively select securities in pursuit of specific investment objectives. Investors gain the flexibility and efficiency of ETFs while benefiting from professional management, proprietary investment strategies, or anything else that may bring an investment edge.
Traditional indexes generally allocate larger percentages to companies with the largest market-cap. Equal-weight strategies, on the other hand, give each company approximately the same weighting regardless of size. In doing so, concentration of the largest holdings is reduced. An equal-weight strategy provides investors with another way to gain diversified market exposure while introducing a different risk and return profile.
Rather than purchasing a fund, direct indexing allows investors to own the underlying securities directly. This approach creates opportunities for greater customization, tax-loss harvesting, and portfolios tailored to an individual's preferences or financial goals.
Over one recently completed 25-year period, index funds helped investors save an estimated $503 billion in fees.2 Keeping those savings invested allowed additional dollars to compound over time, giving investors more opportunity to benefit from a passive long-term investment strategy.
But those savings don’t equal the amount investors have earned from index investing. Let’s take a hypothetical investor who put $10,000 in the Vanguard 500 Index Fund at its inception in 1976. By February 28, 2026, that same investment could have grown to nearly $2.2 million.2 This remarkable level of growth illustrates the potential for the combined impact of disciplined investing, low costs, and the extraordinary power of compounding across long periods.
We believe investors deserve the efficiency, accessibility and potentially long-term growth that indexing introduced. But now, fifty years later, the lesson isn’t that one approach fits everyone. It’s that investors should have access to the tools and strategies that best serve their goals.
Whether through passive funds that build on the foundation of index investing or carefully designed active ETFs that seek to add value in targeted ways, Motley Fool Asset Management carries forward the spirit Jack Bogle championed: putting investors first, keeping costs in mind, and helping people pursue their long-term goals.