The Best Investment Strategy Was Always Free — It Just Took 50 Years for Anyone to Let You Use It

There's a quiet revolution sitting inside roughly 60 million American retirement accounts right now. It doesn't have a dramatic origin story, no charismatic founder on the cover of a magazine, no viral moment. It's an index fund — probably a few of them — and the fact that ordinary Americans can access this tool as easily as downloading an app represents one of the most underappreciated financial transformations of the past half-century.

But to understand why it matters, you have to understand how locked out most Americans were from serious investing not that long ago.

Wall Street in 1975: Not Exactly Welcoming

If you were an average working American in 1975 — a teacher, a factory worker, a small business owner — and you wanted to invest in the stock market, the barriers were substantial enough to stop most people before they even started.

First, you needed a broker. Not an app. An actual human being, typically working at a full-service firm, who would place trades on your behalf. Commission rates before 1975 were fixed by regulation, meaning brokers charged whatever the industry agreed to charge. A typical stock trade could cost anywhere from $50 to $200 in fees — equivalent to $300 to $1,200 in today's dollars. On a small investment, those costs ate your returns before the market even had a chance to help you.

May 1, 1975 — known in financial circles as "May Day" — brought the deregulation of brokerage commissions, cracking the door open slightly. Discount brokers began to emerge. But even then, minimum account balances, intimidating paperwork, and a general culture that treated investing as something for wealthy professionals kept most ordinary Americans on the sidelines.

Mutual funds existed, but they came with their own friction. Annual expense ratios of 1% to 2% were standard. Load fees — essentially sales commissions paid upfront — added another 4% to 8% on top. A $10,000 investment could lose $800 before it was ever deployed into the market.

And underlying all of it was a simple, uncomfortable truth: most actively managed funds, despite charging all those fees, failed to consistently beat the market over time.

The Idea That Wall Street Hated

In 1975, a Princeton economist named Burton Malkiel published A Random Walk Down Wall Street, arguing that stock prices move unpredictably enough that a blindfolded monkey throwing darts at a stock listing could match the performance of professional fund managers. The book was not popular on Wall Street.

Around the same time, a Vanguard executive named John Bogle was developing something that put that theory into practice. In 1976, Vanguard launched the First Index Investment Trust — the first index fund available to retail investors. The concept was straightforward: instead of paying analysts to pick stocks, just buy everything in the S&P 500 in proportion to its market weight. Track the index. Keep costs as low as possible. Let the market do the work.

The financial industry's response was somewhere between mockery and hostility. The fund was nicknamed "Bogle's Folly." It raised just $11 million in its initial offering — a fraction of the $150 million target. Why would anyone want average returns, the critics asked, when they could pay for expertise and get better ones?

The problem, as decades of data would eventually make undeniable, was that the expertise wasn't delivering. Study after study confirmed that the majority of actively managed funds underperformed their benchmark index over long periods, especially after fees were factored in. The math was simple. The implications were enormous.

From Fringe to Foundation

Progress was slow at first. Through the 1980s and into the 1990s, index funds remained a niche product. The real acceleration came from two directions simultaneously: the rise of the 401(k) as the dominant American retirement vehicle, and the invention of the exchange-traded fund (ETF).

The 401(k), which became widely available through the 1980s, pushed investment decisions down to individual employees for the first time. Suddenly, millions of Americans who had never thought much about portfolios were being asked to allocate their retirement savings. Index funds, with their simplicity and low costs, were a natural fit.

Then in 1993, State Street launched the SPDR S&P 500 ETF — now known by its ticker SPY — bringing index investing to the stock exchange itself. ETFs could be bought and sold like individual stocks, required no minimum investment beyond the price of a single share, and carried expense ratios that kept dropping as competition intensified.

By 2025, the transformation is complete in ways that would have seemed implausible to those 1975 investors. Vanguard, Fidelity, and Schwab all offer S&P 500 index funds with expense ratios at or near zero. Commission-free trading is the industry standard. A teenager with $1 can buy a fractional share of an S&P 500 ETF on their phone in about three minutes.

What the Numbers Actually Show

Here's the contrast in plain terms:

1975:

• Brokerage commission: $50–$200 per trade
• Typical mutual fund expense ratio: 1%–2% annually
• Load fees: 4%–8% upfront
• Minimum investment: Often $1,000–$3,000
• Index fund options for retail investors: Effectively zero

2025:

• Brokerage commission: $0
• S&P 500 index fund expense ratio: As low as 0.03% annually
• Load fees: Largely extinct
• Minimum investment: $1 (fractional shares)
• Index fund and ETF options: Thousands

That shift in cost structure compounds dramatically over time. An investor paying 1.5% annually in fees versus 0.03% over a 30-year career doesn't just save a little money — they can end up with tens of thousands more in retirement savings, sometimes significantly more, depending on the account size.

The Democratization That Actually Happened

Financial democratization gets talked about a lot, and often the reality doesn't match the rhetoric. But in this case, something genuinely changed. The tools that institutional investors and the ultra-wealthy used to build long-term wealth — broad market exposure, low costs, disciplined long-term holding — are now available to anyone with a smartphone and the discipline to leave their account alone.

Bogle, who died in 2019, estimated that his index fund concept had saved American investors over $1 trillion in fees over its lifetime. Whether that number is precisely right or not, the direction is undeniable.

The market was never the secret. The access was. And for a few decades, that access was quietly, systematically denied to the people who needed it most.