What makes equal weight ETFs different?
While traditional ETFs invest morein large companies and less in small ones, equal weight ETFs do the opposite—they treat every company equally.
This approach can:
- Reduce concentration risk (too much exposure to a few stocks)
- Give smaller, faster-growing companies more influence
- Avoid overloading on overvalued mega-caps
In theory, that sounds like a smartlong-term strategy.
But in practice? The results have been mixed.
When equal weighting didn’t work
Let’s take the ASX 200 index as an example. The top four Aussie banks—CBA, NAB, ANZ and Westpac—make upover 24% of the index by market cap.
An equal weight ETF would significantlyreduce exposure to those banks. But in recent years, CBA’s outperformancehas been a key driver of index gains. Traditional ETFs that kept buying CBA—despite analysts calling it overvalued—ended up delivering strong returns.
In that case, equal weighting meant missing out.
The US example: Tech makes equal weight look foolish (for now)
In the US, the Betashares S&P 500 Equal Weight ETF (ASX: QUS) has underperformed its benchmark by anaverage of 3.5% annually over the past five years.
Why? Mega-cap tech.
Companies like:
- Apple (AAPL)
- Microsoft (MSFT)
- Nvidia (NVDA)
- Alphabet (GOOGL)
- Meta Platforms (META)
These giants have soared—and traditional ETFs have benefitted from their dominance. But equal weight ETFs kept trimming their exposure to those winners, and reallocating to smaller companies thatdidn’t keep up.