Assuming the purpose of this exercise is to help ordinary people (so not AAM pros) decide which will give them the best chance of a higher after-tax return between investing in an index via an ETF or by buying a basket (say 20) of individual shares from the index, there are two other rows for the spreadsheet that could do with some discussion, I think.
The first is how closely the basket of shares follows the index/ETF. The obvious factor is that you could be unlucky, and a number of your picks could drop and stay down (sectoral issue, geographic issue, etc.), which will tend to have less impact in a 500-1500 constituent index/ETF. Less obvious factors include:
The other factor is the cost of one's time, which is consumed in some of the following ways when not using an ETF:
The first is how closely the basket of shares follows the index/ETF. The obvious factor is that you could be unlucky, and a number of your picks could drop and stay down (sectoral issue, geographic issue, etc.), which will tend to have less impact in a 500-1500 constituent index/ETF. Less obvious factors include:
- Not rebalancing frequently enough and becoming overexposed in certain areas.
- Rebalancing too frequently and incurring extra transaction fees.
- Insufficient understanding/research to properly diversify across sectors, geographies, or accurately mimic the index.
- Allowing emotions to trigger a buy in a sector you 'like' (AI/crypto a good example today) or a sell after bad news/languishing (Apple in the 90s, Microsoft in the 00s, Ford in the 2010s).
So perhaps +0.6% return to ETFs would be a good conservative guesstimate given the samplers in this study are pros?A novel paper by Dyer and Guest (2022) offers several insights on this topic as it examines the tracking ability of 3,365 U.S.-based equity physical ETFs and mutual funds from 2010 through 2020. Among the studied funds, 52% use physical replication, 37% use representative sampling, and the remainder are 'hybrids' that typically employ physical replication but may implement sampling under certain conditions. The study shows that sampling funds have higher turnover and expenses while earning worse returns relative to full replication funds. In particular, the differences in costs and returns translate into about 60 basis points lower returns for samplers per year on a net return basis. This finding is not driven by niche indices, as authors find similar results in the subsample of funds tracking the S&P 500 and other market-cap-based indices.
The other factor is the cost of one's time, which is consumed in some of the following ways when not using an ETF:
- Learning is required upfront to figure out the basics of how to diversify stock picks and understand the makeup and behaviour of the index you're trying to replicate.
- The portfolio needs to be assessed, say once a year, and research done to decide if rebalancing is required and if so, how much of which stocks to buy/sell.
- From experience, there is quite a bit of administrative overhead involved in holding 20+ global shares, for example, US W-8BEN foreign investor forms every few years, lodging dividend cheques, documenting dividend withholding taxes, transferring all of this to your accountant every year and answering questions, reading through notifications about splits, rights-issues, delistings and wondering if you'll be impacted.
- An eye will need to be kept on estate planning rules in certain countries usually included in global indices in case they shift out of your favour.
- While perhaps not applicable to AAM pros, the average person will spend a non-zero number of hours worrying about why a stock they chose has gone down, how it impacts them and should they take action, or one going up they overlooked - this will generally occur around 3am-4am in my experience, a time I tend to value highly for sleep.