Do your ETFs secretly own the same companies? A question worth sitting with

Saturday morning is a good moment to look at the week with clear eyes. Friday left Australian investors with a broad market fall to sit with, and today's community question cuts to something that trips up a lot of thoughtful portfolios. Let's take it in order.

A question worth sitting with

A member this week counted their ETFs and noticed something uncomfortable. Six funds in the portfolio, four of them largely holding the same big companies underneath. The portfolio looked well spread at first glance, but under the bonnet there was a lot of repetition.

It is easy for this to happen without anyone doing anything wrong. Many broad Australian and global ETFs are simply required to hold the largest companies by market size, so an ASX 200 fund, a broad global fund and a few thematic funds can all quietly agree on the same handful of names. The question worth sitting with this weekend: if you list every ETF you own, do you actually know which companies are sitting in the top ten of each one? And when you add those lists together, how concentrated does the picture really look?

What moved on Friday

Friday's close was rough across the board. Every sector the PortLens data covers finished in the red, with Energy leading the losses at -3.03%, followed by Consumer Staples at -2.55% and Real Estate at -2.51%. Health Care and Financials were not far behind. When falls are this broad, it usually reflects a macro mood shift rather than anything specific to individual companies.

Among the most-affected names, COH fell 3.80% and GMG dropped 2.56%, both swept up in the general retreat. On the other side, KAR gained 2.64% and NDQ added 2.06%, a reminder that even on difficult days parts of the market can move against the grain. Neither result tells you much about what those names will do next week.

A lesson worth keeping

Counting the number of funds you hold is not the same as measuring how spread out your risk actually is. Diversification lives inside the holdings, not in the number of products on your statement. Two ETFs with different names can carry almost identical underlying exposure if they both track size-weighted indexes.

The useful habit is to look one layer deeper. Most ETF providers publish their top ten holdings monthly. Spending fifteen minutes lining those lists up side by side will tell you more about your real risk profile than any fund name or marketing label ever will. PortLens calls this the telescope view: pulling back until you can see what you actually own, not just what you think you own.

Have a restful weekend. The ASX opens again Monday, and a little quiet reflection now is rarely wasted. This note is general information only and is not personal financial advice.