Why Check a Fund's Top 10 Holdings Concentration When Comparing Funds?
Two funds can share almost the same category label and still put very different portions of their money into a handful of the same large positions.
The short answer
Checking a fund’s top 10 holdings concentration shows how much of its total assets are tied to just a few companies or bonds. A fund with heavy concentration in its largest positions behaves more like a bet on those specific holdings than a broad, spread-out approach, even if its category name suggests general diversification.
Why a category label can hide concentration
Fund categories are usually organized around broad criteria like sector, size, or geography, and that classification says nothing about how the fund’s money is distributed within those boundaries. A fund could hold hundreds of positions on paper while still directing a large share of its assets into a small handful of them, often because those companies also happen to make up a large portion of the index or theme the fund is built around. Two funds in the same category can therefore carry very different levels of concentration risk without either one misrepresenting its stated strategy.
What high concentration means in practice
When a large share of a fund’s assets sits in its top 10 holdings, the fund’s overall performance becomes more sensitive to how those specific companies perform. A strong quarter for one or two large positions can meaningfully lift the fund’s return, and a weak one can drag it down, in a way that wouldn’t happen in a fund spread more evenly across many smaller positions. This isn’t inherently a flaw — it can reflect a deliberate strategy — but it does change the fund’s risk profile relative to a more evenly weighted alternative.
How to compare concentration across funds
- Look at the total percentage in the top 10. A fund listing 15 percent of assets in its ten largest holdings behaves differently than one listing 45 percent, even under the same category label.
- Check for overlap between funds. Two funds held together in the same account can end up concentrated in the same handful of companies without the investor realizing it, which reduces the diversification they may have expected.
- Compare against a relevant benchmark. Some concentration simply mirrors the index or sector the fund tracks, so comparing the fund’s weighting to its stated benchmark helps clarify whether it’s more or less concentrated than that baseline.
- Read past the summary page. A fund fact sheet usually lists the current top holdings, but the full breakdown and how often it’s updated may only appear in more detailed fund materials.
Why this matters more for some funds than others
Concentration tends to matter most in funds built around a narrow theme, a single sector, or a small number of very large companies within an index, since those structures naturally push weight toward a few names. A fund spread across a wide index or many sectors is less likely to carry this kind of risk, though it’s still worth a quick check rather than an assumption.
What to weigh
Holdings concentration is a detail that a fund’s name or category alone won’t reveal. Looking at the actual percentage tied up in the largest positions, and how that compares to a relevant benchmark, gives a clearer sense of what kind of risk a fund is actually carrying.