Why 90% of Active Fund Managers Underperform

Most active fund managers fail to beat the market. Not because they are dumb. Not because they lack fancy degrees or Bloomberg terminals or 80-hour work weeks. They fail because the math is stacked against them, the incentives are misaligned, and the data has been telling us this for decades while most investors refuse to listen. If you are paying someone 1-2% annually to pick stocks for you, you are almost certainly paying for underperformance with a nice suit.

This is not some fringe opinion. The SPIVA scorecard – the industry’s own report card – shows that over a 15-year period ending in 2024, roughly 88-92% of large-cap US equity fund managers failed to beat the S&P 500. That number gets worse the longer you extend the timeframe. And yet the active management industry still controls trillions. Somebody explain that to me.

What Does the Data Actually Say About Active vs. Passive?

Let us start with the numbers, because numbers do not have marketing budgets.

S&P Global publishes the SPIVA report twice a year, and it has been doing so since 2002. Every single report tells essentially the same story. Over any rolling 10, 15, or 20-year window, the vast majority of actively managed funds underperform their benchmark index. This is not a US-only phenomenon. The data looks similar in Europe, Japan, Australia, and emerging markets. Active management underperforms everywhere.

Here are the approximate figures for the US market through 2024:

• 1-year period: About 55-60% of active funds underperform
• 5-year period: About 75-80% underperform
• 10-year period: About 85-88% underperform
• 15-year period: About 88-92% underperform
• 20-year period: Over 90% underperform

Notice the pattern. The longer the time horizon, the worse it gets. This is not random. There is a mechanical reason for it, and we will get to that in a moment.

In specific categories, the numbers are even more brutal. Active managers in the US mid-cap and small-cap space have historically underperformed at rates exceeding 90% over 15-year periods. International fund managers fare no better. The data is so consistent across geographies and time periods that at some point you have to stop calling it a fluke and start calling it a law.

Meanwhile, look at the money flows. Vanguard now manages over $9 trillion in assets globally as of 2025. Index fund and ETF assets have surpassed active fund assets in the US. Investors are voting with their wallets, even if slowly. The shift from active to passive has been one of the most significant trends in financial history over the past two decades, and it accelerated after 2020 as a new generation of investors came in through platforms like Fidelity, Schwab, and Robinhood with easy access to zero-cost index ETFs.

Why Do Fees Compound Against You?

Here is where the engineering part of my brain gets angry. Fees are not just a line item. They are a compounding machine that works against you for every year you hold the investment.

Consider two scenarios. Investor A puts $100,000 into an S&P 500 index fund with an expense ratio of 0.03% (that is what Vanguard’s VOO charges in 2025). Investor B puts the same $100,000 into an actively managed fund charging 1.0% – which is actually on the lower end for active funds; many charge 1.2-1.5%.

Assume both funds earn a gross return of 10% per year before fees. After 30 years:

• Investor A (index fund, 0.03% fee): About $1,728,000
• Investor B (active fund, 1.0% fee): About $1,321,000

That is a difference of over $400,000 on a $100,000 investment. Gone. Not to the market, not to bad luck – to fees. And remember, this assumes the active fund actually matches the index before fees. Most do not, which makes the gap even wider.

The 1% fee does not sound like much. “One percent, what is the big deal?” is something you hear all the time. The big deal is that 1% of your assets every year, compounded over decades, is an enormous amount of money. It is the most expensive cheap-sounding number in finance.

This is before we talk about hidden costs. Active funds trade more frequently, which means higher transaction costs. They may also trigger more taxable events, creating drag on after-tax returns that does not show up in the headline performance numbers. A 2023 Morningstar study estimated that the average actively managed equity fund’s total cost of ownership – including expense ratio, transaction costs, and tax drag – was closer to 2.0-2.5% annually. Now run those compounding numbers again with a 2% drag and try not to close your brokerage account.

Why Are Incentives Broken in Active Management?

This is the part that really matters, and it is the part most financial media ignores because it is uncomfortable.

Active fund managers are not primarily incentivized to beat the market. They are incentivized to gather assets. The business model of active management is built on fees charged as a percentage of assets under management (AUM). A fund that manages $10 billion and charges 1% earns $100 million in revenue, regardless of whether it beats the S&P 500 or trails it by five percentage points. The manager gets paid either way.

Think about what this incentive structure produces. The rational move for a fund manager is not to take bold, concentrated bets that might dramatically outperform – because those same bets might dramatically underperform, which causes investors to pull their money, which shrinks AUM, which shrinks the manager’s paycheck. The rational move is to hug the benchmark closely enough that you never blow up, market yourself aggressively, and collect your fees.

This is exactly what the data shows. The average active fund’s portfolio looks suspiciously like its benchmark index, with minor overweights and underweights at the margins. The industry has a name for this: “closet indexing.” You are paying active management fees for what is essentially an index fund with a marketing department.

The hedge fund world is even more interesting. The classic “2 and 20” structure (2% management fee plus 20% of profits) creates a different but equally problematic incentive. The 2% base fee means a $5 billion hedge fund earns $100 million before it makes a single trade. The 20% performance fee is nice when it comes, but the base fee is what keeps the lights on and the Hamptons house paid for. This is why hedge funds that have poor years rarely volunteer to shut down – the management fee is too good.

The hedge fund industry quietly lost about $100 billion in net outflows between 2020 and 2024. Many prominent funds closed – and not just small ones. This happened because investors finally started doing math. When the after-fee returns of most hedge funds could not beat a simple 60/40 portfolio of index funds, the value proposition collapsed. Warren Buffett’s famous bet that an S&P 500 index fund would outperform a basket of hedge funds over ten years was not a close call. The index fund won by a wide margin.

What About Survivorship Bias?

Here is a dirty secret that makes the active management track record even worse than it looks.

When you see a fund database or a performance study, you are usually only looking at funds that still exist. Funds that performed terribly over a period tend to close down or merge into other funds, and their track records disappear from the database. This is called survivorship bias, and it artificially inflates the apparent performance of the active management industry.

The SPIVA scorecard accounts for this, which is one reason its numbers are so damning. But most casual comparisons do not. If you look at a list of “active funds that beat the index over 15 years” and feel impressed by the ones that made it, remember that you are not seeing the hundreds of funds that started during that same period and quietly died along the way.

Between 2005 and 2024, roughly 40-50% of US equity funds were either merged or liquidated. That is not a rounding error. Half the funds that started did not survive. And the ones that disappeared were disproportionately poor performers. So when someone tells you “here is a great active fund with a 15-year track record,” ask yourself: out of how many funds that started 15 years ago? You are looking at the survivors.

This creates a second problem: performance persistence. Is the fund that beat the index over the past 10 years likely to beat it over the next 10? The data overwhelmingly says no. S&P Dow Jones publishes a persistence scorecard, and it shows that top-performing funds in one period are no more likely to be top performers in the next period than random chance would predict. Last decade’s winner is this decade’s average performer. Picking the next outperforming active fund in advance is about as reliable as picking the next winning lottery numbers.

What Does This Mean for Individual Investors in 2025?

The practical implications are straightforward, and they are good news if you are willing to accept them.

The default option is now the best option. A simple portfolio of low-cost index funds – a total US stock market fund, an international stock market fund, and a bond fund – will outperform the vast majority of active strategies over your investing lifetime. This was a controversial statement in 2000. In 2025, it is a mathematical near-certainty.

The tools have never been better. In 2025, you can buy a total world stock market ETF for an expense ratio of 0.07%. You can automate contributions through any major brokerage. Robo-advisors like Betterment, Wealthfront, or Vanguard Digital Advisor will build and rebalance a diversified index portfolio for you for 0.25% or less. The friction between you and a well-diversified, low-cost portfolio has been reduced to nearly zero.

The remaining edge for active management is narrow. Are there active managers who outperform? Yes. But identifying them in advance is nearly impossible, and paying the fees for the ones who will not outperform (which is most of them) is a guaranteed drag on your returns. The few areas where active management may add value – distressed debt, private equity, small-cap deep value – are largely inaccessible to individual investors and require scale that most of us do not have.

The real enemy is behavior, not strategy. Even with the perfect index fund portfolio, you can still lose money by panic-selling in a downturn, chasing last year’s hot sector, or trying to time the market. The advantage of a boring, automated index fund strategy is not just low fees – it is that it gives you less rope to hang yourself with. The fewer decisions you make, the fewer opportunities you have to make bad ones.

Key Takeaways

• Over 90% of active fund managers fail to beat their benchmark index over 15+ years. This is not a sample size problem or bad luck – it is a structural feature of the industry.
• Fees compound against you relentlessly. A 1% annual fee sounds small but can cost you hundreds of thousands of dollars over an investing lifetime.
• Fund managers are incentivized to gather assets, not to beat the market. The AUM-based fee model rewards benchmark-hugging and marketing over genuine investment skill.
• Survivorship bias hides the true underperformance of active management. The funds that failed quietly disappear from the data, making the survivors look better than they are.
• Performance persistence is essentially nonexistent. Last decade’s winning fund is no more likely to win next decade than a random pick.
• For most individual investors in 2025, a portfolio of low-cost index funds remains the most reliable path to long-term wealth. The math has not changed, and it will not change.

The data is clear. The math is simple. The hardest part is accepting that the boring answer – buy cheap index funds, automate your contributions, and do nothing – is almost certainly the right one. Most of the financial industry exists to convince you otherwise, because “do nothing” does not generate fees. But your portfolio does not care about anyone’s fee revenue. It only cares about net returns. And on net returns, the index wins.