You buy and sell
ETF
shares through a
brokerage account
when the markets are open. And, if you have an online account, you can give your broker an order at any time to be filled when the markets reopen or the price reaches the level at which you wish to buy or sell. The
commission
your broker charges will generally be in line with the amount you pay on other stock transactions. Alternatively, you may have a fee-based brokerage account that covers the cost of your transactions or an account that allows a certain number of transactions for a fixed charge.
As with other investments, the larger your purchase, the less the commission may be as a percentage of what you spend. And the longer you hold an ETF, the smaller the impact the cost of buying has on your return.
If you pay a commission on each transaction, you may want to evaluate whether or not
dollar cost averaging (DCA),
or investing a fixed amount of money on a regular schedule, is an economical way to purchase ETFs. Say, for example, you make an initial investment and plan on adding $150 to your account each month. That may cost more than making less frequent purchases of larger amounts. On the other hand, if you buy when prices are down as well as when they're high, you could end up paying less per share than the average share price over time. But remember, dollar cost averaging doesn't guarantee a better return than other ways you invest and won't protect you against losses if the markets drop.
Making fund comparisons
In deciding whether an ETF or mutual fund might be the better investment in a particular situation, you may want to compare their sales charges. The average load, or sales charge, for a mutual fund may be higher than the commission on an ETF with the same investment objective — or it may not be. While cost isn't the only factor to consider in making an investment decision, it can make a difference in your
return.