https://www.theglobeandmail.com/investing/investment-ideas/article-a-master-class-in-frugal-etf-investing-a-gold-stock-that-shines-and/A column last week looked at how TD e-series of index mutual funds would be cheaper than exchange-traded funds for an investor who wants to make monthly contributions and has a portfolio of $50,000 or less. While the e-series index fund has a higher management expense ratio than a comparable ETF, money can be invested in the index fund at no cost. Commissions for buying ETFs can be as high as just under $10 per purchase or sale, which works out to $120 per year. On a $30,000 account, that would be the equivalent to a hefty fee of 0.4 per cent.