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ETF Holdings - Diving in even further...

Updated: Aug 4, 2021

Thanks to the fantastic reception of the Digging Deeper into ETF Holdings article this week I thought I'd do another that looks at some observations that came from tracking changes in the Top 10 ETF holdings per Yahoo Finance.

Firstly, I've been monitoring the 150+ ETFs where top 10 holdings are shown on Yahoo Finance each day to flag where there might be changes. For the first few days there were no changes across the ETFs and their underlying (top 10) holdings. But on day 4 we finally saw some differences in 10 of those ETFs.

Below we see the overall change in weight that the top 10 holdings were for the ETFs we analyse. This chart is the difference between ETF weight of the top 10 holdings on the 8th March 2021 - 11th March 2021.

From the time we began analysing this data (8th March 2021), the total weight of the top 10 holdings in IOZ was 44.4%. On the 11th March 2021 this was now 45.4% with subtle increases and decreases across the equities it holds.

Analysing this same data for the difference between 8th March 2021 and 16th March 2021 shows that 129 of the ETFs had changes and we can firstly see the largest increases.

as well as the largest decreases.

The change in CLDD is due to its holdings not showing on Yahoo Finance until now (it is a very new listing).

Digging into these we can see what has changed. For example, SPY which saw 22.4% of its total weight sitting in its top 10 holdings saw that increase to 27.4%. Below we can see that there is a stopping of one type of Berkshire stock (names cut off in this image) and into another but they both have Class B labels so perhaps there is some renaming of that stock. We can also see that Visa dropped out of the top 10 and Tesla makes an appearance as well other increases/decreases in existing holdings. This does not mean that Tesla was not there, merely that these stocks moved in and out of the Top 10 holdings as that's all we see in the data we analysed.

For ROBO we can see the addition of 3D Systems Corp and AeroVironment whilst stocks like Cognex and Daifuku dropped out of the top 10.

We also looked at ETFs with the biggest decreases in total weight of their top 10 holdings such as CRED.

and also WDIV.

Anyway, it's pretty interesting tracking these sorts of insights and the observant among you may have picked up that we have a missing date (14th March 2021). This is a test in progress but a fun one to do for now.

Stay tuned for more ETF insights coming your way soon.

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