To determine when to buy an ETF, some investors use technical analysis and other tools. But you need to dig deeper.

Investors often wonder: what is a good entry point when purchasing a stock or an ETF?

The first question before asking when to buy an ETF is whether an exchange traded fund investment is right for your portfolio. An ETF investment is one of the most popular and most benign investing innovations of our time. ETF investments are a little like conventional mutual funds, but with two key differences.

First, ETF investments trade on a stock exchange throughout the day, much like ordinary stocks. So you can buy them through a broker whenever the stock market is open, and generally you pay the same commission rate that you pay to buy stocks. In contrast, you can only buy most conventional mutual funds at the end of the day. What’s more, commissions vary widely, depending on negotiations with your broker or fund dealer.

Second, the MER (Management Expense Ratio) is generally much lower on ETFs than on conventional mutual funds. That’s because most ETFs take a much simpler approach to investing. Instead of actively managing clients’ investments, ETF providers invest so as to mirror the holdings and performance of a particular stock-market index.

ETFs practice this “passive” fund management, in contrast to the “active” management that conventional mutual funds provide at much higher costs. Traditional ETFs stick with this passive management—they follow the lead of the sponsor of the index (for example, Standard & Poors). Sponsors of stock indexes do from time to time change the stocks that make up the index, but generally only when the market weighting of stocks change. They don’t attempt to pick and choose which stocks they think have the best prospects.

This traditional, passive style also keeps turnover very low, and that in turn keeps trading costs for your ETF investment down.

When to buy an ETF

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