Building Your Own Index with Individual Stocks
Long-time reader, Gene, asked the following good question. “Have you considered making a pseudo index fund by buying perhaps 15 large-cap stocks from each of Canada and the USA that would mimic an index? Not ideal for a growing portfolio, but for a relatively-stable account, and low commissions, it could save money on fees. Drawbacks are that it would be harder to increase or decrease holdings, and the savings wouldn't be huge over already inexpensive ETFs.” Gene is right that a carefully-run stable portfolio of stocks can cost less in fees than index ETFs. However, an important issue is how well such a portfolio would track its index. For an answer here, I turn to Meir Statman’s paper How Many Stocks Make a Diversified Portfolio ? Table 1 of this paper shows how the standard deviation of portfolios varies with the number of stocks you own. At this point, I need to diverge to a topic that few investors understand well: volatility losses. Consider a very simple example. In...