The Future of Index Fund Investing
Index funds went from heresy to default in 50 years. The next era is about fees near zero, passive surpassing active, and direct indexing letting you own the index stock-by-stock. Here's the trajectory.
Don't have time? Here's what you need to know:
- 1Index investing went from "Bogle's folly" in 1976 to rivaling or surpassing active funds in U.S. equity assets today.
- 2Fees have compressed from ~1% active funds to 0%–0.03% broad index funds, so cost is no longer the main differentiator between mainstream options.
- 3Direct indexing lets you own an index stock-by-stock for custom screening and finer tax-loss harvesting — most useful in large taxable accounts.
- 4The fundamentals don't change: broad diversification, low costs, and staying invested remain the foundation no matter how products evolve.
From Heresy to Default
When Vanguard launched the first retail index fund in 1976, the industry mocked it as "Bogle's folly" — settling for average returns seemed absurd when managers promised to beat the market. Half a century later, the joke aged badly. Passive funds have grown to rival and, by some measures, surpass active funds in total U.S. equity assets, and the once-radical idea of simply owning the market is now the mainstream default for everyone from new investors to pension funds.
That shift was driven by evidence, not fashion. As SPIVA scorecards piled up showing roughly 90% of active funds losing to their benchmarks over 15 years, and as fee transparency improved, money moved relentlessly toward low-cost index funds. The trends shaping the next chapter are mostly extensions of that same logic: cheaper, broader, and more customizable ways to own the market.
Fees Are Compressing Toward Zero
The most visible trend is the race to the bottom on cost. Broad-market index ETFs that once charged 0.20% now charge 0.03% or less, and several firms have launched zero-expense-ratio index funds, making money instead through securities lending and by cross-selling other services. For investors, this is close to an unambiguous win: the single most reliable predictor of a fund's future performance is its expense ratio, and that number is heading toward zero.
There is a practical floor to this trend — funds still have real costs, and "free" funds recoup them in less visible ways — but the direction is clear. Cost has been competed down to the point where it is nearly negligible for broad index products. The implication for investors is that fee differences between mainstream index funds now matter far less than they did a generation ago; the bigger differentiators going forward are structure, tax treatment, and customization.
| Era | Typical broad-index cost | What changed |
|---|---|---|
| 1970s–80s | Active funds ~1%+ | First index fund launched (1976) |
| 1990s–2000s | ~0.20% | ETFs arrive, indexing goes mainstream |
| 2010s | ~0.03–0.05% | Fee wars among Vanguard, iShares, Schwab |
| Now / next | 0% to ~0.03% | Zero-fee funds, direct indexing emerges |
Direct Indexing: Owning the Index Stock-by-Stock
The most genuinely new development is direct indexing. Instead of buying a fund that holds the index, you own the underlying stocks directly in your own account, replicating an index like the S&P 500 share by share. Falling trading costs, commission-free trades, and fractional shares have made this practical for ordinary investors for the first time — what was once available only to the wealthy is becoming a mass-market product.
The appeal is customization and tax control. Because you own the individual stocks, you can harvest tax losses on specific names that fall even while the index rises overall — a level of tax-loss harvesting a single fund cannot match. You can also exclude companies you object to or tilt toward your own preferences, getting personalized screening without buying a separate ESG fund. The tradeoffs are added complexity, potential account minimums, and the work of managing many positions — so for most people a simple, cheap index fund remains the better default, with direct indexing a tool for those with larger taxable accounts and specific needs.
Tip: Direct indexing's killer feature is tax-loss harvesting on individual holdings, which a fund can't do. It matters most in large taxable accounts — in a tax-sheltered IRA, the benefit largely disappears.
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What Won't Change
It is worth separating genuine progress from noise. Some predicted trends are oversold: warnings that passive investing will "break" markets have circulated for years, yet active managers still set prices at the margin and passive ownership remains a fraction of total trading volume. New product fads — thematic ETFs, leveraged single-stock funds, complex "defined-outcome" wrappers — arrive constantly, and most are higher-cost distractions from the simple core that actually builds wealth.
Underneath all the innovation, the fundamentals that made indexing work are not changing. Broad diversification, low costs, and the discipline to keep contributing and stay invested will remain the foundation no matter how the products evolve. Direct indexing and zero fees are refinements at the edges of a strategy whose core is already close to optimal. The future of index investing is mostly the present, made cheaper and more customizable — and the investor who masters the basics today will not be left behind by whatever comes next.
Important: Don't mistake every new product for progress. Thematic, leveraged, and "defined-outcome" funds are mostly higher-cost distractions from the cheap, broad, boring core that does the real work.
Frequently Asked Questions
What is direct indexing and is it better than an index fund?
Direct indexing means owning the individual stocks of an index in your own account rather than buying a fund that holds them. Its advantages are customization and finer tax-loss harvesting on specific stocks, which a fund can't replicate. But it adds complexity and sometimes account minimums. For most investors a simple, cheap index fund is still the better default; direct indexing mainly benefits larger taxable accounts with specific tax or screening needs.
Will index fund fees really go to zero?
Several broad index funds already charge zero expense ratio, recouping costs through securities lending and other services. There's a practical floor — funds have real expenses, so "free" funds make money elsewhere — but mainstream broad-index costs have fallen so far (0% to about 0.03%) that fee differences between them now barely matter. Cost is no longer the main differentiator it was a generation ago.
Is passive investing growing too large to be safe?
Concerns that passive funds will distort or "break" markets have circulated for years but remain overstated. Active managers still set prices at the margin, and passive ownership is a fraction of total trading volume. A broad index fund also spreads your money across thousands of companies. The main risk you carry is ordinary market risk — the same risk active investors face — at a far lower cost.
Should I change my strategy to keep up with these trends?
Probably not. Most innovations — direct indexing, zero fees — are refinements at the edges of a strategy whose core is already close to optimal. Broad diversification, low costs, and the discipline to keep contributing remain the foundation regardless of new products. Many fashionable launches like thematic or leveraged funds are higher-cost distractions. Mastering the simple basics today won't leave you behind tomorrow.
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Alex Harrington
CFA Level II Candidate, Finance & Economics
Alex Harrington is an independent ETF researcher and personal finance writer with over 8 years of experience analyzing exchange-traded funds. A CFA Level II candidate with a background in economics, Alex has reviewed 800+ ETFs and helped thousands of beginners build their first investment portfolios through clear, jargon-free education.
This content is for educational purposes only and does not constitute financial advice. Past performance does not guarantee future results. Consult a licensed financial advisor before making investment decisions.