Community question: do your ETFs overlap more than you think?

Wednesday brought a mixed session on the ASX. One sector led the way convincingly, a few others gave back some ground, and the overall picture was a reminder that not all parts of a portfolio move in step. Here is what caught our eye.

A question worth sitting with

If you own a handful of different ETFs, it is easy to feel like you have spread your risk around. But many popular funds hold the same big companies inside them. A broad Australian shares ETF, a large-cap ETF and a dividend-focused ETF might all carry a heavy slice of the same four or five banks and miners. The labels on the tin look different. The contents can be surprisingly similar.

So here is the question for the community: when you look inside the funds you own, how much of your portfolio is actually riding on the same small group of companies, and does that change how you think about your exposure?

What moved today

Materials was the clear story today, up 2.78 percent. Energy and real estate both added modest gains of 0.63 and 0.78 percent respectively. On the other side, communication services slipped 0.80 percent and financials eased 0.59 percent. CBA and NAB both closed flat, which tells you the financials drag came from elsewhere in the sector.

Among the ETFs in the data, NDQ added 0.97 percent, while the broad-market funds VAS and IOZ were both slightly positive at 0.40 and 0.37 percent. The gap between NDQ and the domestic funds reflects the different sector weights each one carries. Materials has little presence in a tech-tilted fund, while it can drive a broad Australian index meaningfully on a day like today.

A lesson worth keeping

There is a version of long-term investing that looks almost boring from the outside. One broad fund, bought regularly, left alone. No sector rotation, no chasing themes, no rebalancing drama. A lot of experienced investors, looking back, say that approach would have served them just as well as anything more elaborate they tried.

That is not an argument against thinking carefully about your portfolio. It is an argument for asking whether each layer of complexity you add is genuinely earning its place. Simplicity is not laziness. Sometimes it is the sharpest tool in the shed.

That is the note for Wednesday. As always, this is general information only and not personal financial advice. Take what is useful, leave what is not, and we will be back tomorrow.