3 (More) Mistakes To Avoid With Your ETF Portfolio

 | Sep 19, 2014 02:23AM ET

A little over a year ago I wrote a well-received article about the 5 mistakes to avoid with your ETF portfolio . The tips ranged from not falling in love with your ETFs to trade execution and tax consequences.

Fast forward to today and the ETF universe has expanded in a number of ways that warrant some additional advice in a number of key areas. I share these thoughts as a consequence of my daily research and experience so that you can be better prepared to analyze your holdings and make informed decisions about your ETF portfolio.

Index Construction Is Imperative

The single biggest driver of your returns in each diversified ETF you purchase will be how the index is constructed. That is not to say fees, taxes, and liquidity aren’t important as well. However, the makeup of the underlying holdings will ultimately determine how the portfolio reacts under various conditions and if any outsized holdings will impact returns.

With more than 1,650 exchange-traded products currently available to investors, the slicing and dicing of various indexes is almost limitless. There are ETFs that focus on sectors, industries, market cap, equal weight, fundamental characteristics, momentum data, volatility screens, and a host of other traits.

A great example is the difference between owning the PowerShares S&P 500 High Beta (NYSE:SPHB and PowerShares S&P 500 Low Volatility (NYSE:SPLV. A look at a 3-year chart of these two widely varying indexes shows how strongly they have diverged as a result of their underlying asset allocation.