Do Hedge Funds and Fund Managers Beat the Market?

The short answer. Most do not, after fees. S&P Dow Jones Indices' SPIVA scorecards have found for two decades that the large majority of actively managed US equity funds underperform their benchmark over ten and twenty year periods. The interesting question is therefore not whether professionals beat the market on average — they do not — but why anyone would read their filings anyway.

If most managers underperform, why read 13F filings?

Because a filing is not a recommendation, and the average is not the point. Three reasons survive the fee arithmetic:

1. Filings are a research funnel, not a portfolio. A company several managers with different styles independently bought is worth reading about. That is true whether or not those managers beat an index.
2. Averages hide dispersion. The underperformance is dominated by closet indexers charging active fees. Highly concentrated, low-turnover managers are a different population.
3. You do not pay their fees. The gap between gross and net returns is where most of the underperformance lives. Reading a filing costs nothing.

What does the evidence actually say?

SPIVA's persistent finding is that over 15 years, roughly 90% of active US large-cap funds trail the S&P 500 net of fees. Fees explain a large share of it, and the rest is the arithmetic Sharpe set out in 1991: before costs, the average actively managed dollar must return exactly what the average passive dollar does, because together they are the market. After costs, active must lose. This is not an empirical claim about skill; it is accounting.

So should you just buy an index fund?

For most people, for most of their money, that is the honest default and the research supports it. Nothing on this site argues otherwise.

What individual company research is for is the part of a portfolio where you want to own specific businesses you understand — and for that, knowing who else owns them, and at what size, is genuinely useful context. The mistake is thinking the two are alternatives.

Does concentration change the picture?

There is evidence that managers who deviate most from their benchmark — high "active share" — have historically had better odds than those who hug it, which is intuitive: you cannot outperform an index you have effectively bought. Position count is a rough proxy. A fund holding 600 names is not making 600 decisions.

What this cannot tell you

Nothing about any individual manager's actual returns. A 13F has no cost basis and no timing, so performance figures reconstructed from filings are estimates built on assumptions, not results.

Educational information, not financial advice. Every figure on this page is read from the source filings when the page loads rather than written into the article, so what you are reading is today's data and not a snapshot of the day it was published.