What is the difference between Mutual Funds & ETFs?

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An advantage of mutual funds is that they have lower costs if you only invest a little bit of money, or invest small monthly or quarterly amounts. Since ETFs are traded on the stock market, every trade has commission costs. Many mutual funds do not have such costs. If an investor likes to invest, say, $100 or $500 every month, mutual funds are likely to cost less. However, some online brokers do not charge commissions on ETF transactions, and consequently, the above sentences may no longer be valid 2.

There are many advantages to ETFs, and these advantages will likely increase over time. Most ETFs have a lower expense ratio than comparable mutual funds. Mutual funds can charge 1% to 3%, or more; index funds are generally lower, while ETFs are almost always in the 0.1% to 1% range. Over the long term, these cost differences can compound into a noticeable difference.

ETFs are more tax-efficient than mutual funds in some jurisdictions 3. In the U.S., whenever a mutual fund realizes a capital gain that is not balanced by a realized loss, the mutual fund must distribute the capital gains to their shareholders by the end of the quarter. This can happen when stocks are added to and removed from the index, or when a large number of shares are redeemed (such as during a panic). These gains are taxable to all shareholders, even those who reinvest the gains distributions in more shares of the fund. In contrast, ETFs are not redeemed by holders (instead, holders simply sell their ETF on the stock market, as they would a stock), so that investors generally only realize capital gains when they sell their own shares.

However, there are some potential taxation drawbacks to ETFs in the United States. One argument made in favor of index mutual funds having a tax advantage over ETFs is that ETFs often trade their shares more rapidly to maintain a high cost basis of their underlying shares. This can result in ETF dividends failing to be classified as qualified dividends since the underlying shares don’t satisfy the IRS requirements. This can be a substantial drawback since your ordinary tax rate may be significantly higher than the 15% tax charged on qualified dividends.

Perhaps the most important, although subtle, benefit of an ETF is the stock-like features offered. Since ETFs trade on the market, investors can carry out the same types of trades that they can with a stock. For instance, investors can sell short, use a limit order, use a stop-loss order, buy on margin, and invest as much or as little money as they wish (there is no minimum investment requirement). Also, many ETFs have the capability for options (puts and calls) to be written against them. Mutual funds do not offer those features.

For example, an investor in an open-ended fund can only purchase or sell at the end of the day at the mutual fund's closing price. This makes stop-loss orders much less useful for open-ended funds – if your broker even allows them. An ETF is continually priced throughout the day and therefore is not subject to this disadvantage, allowing the user to react to adverse or beneficial market condition on an intraday basis. This stock-like liquidity allows an investor to trade the ETF for cash throughout regular trading hours, and often after-hours on ECNs. ETF liquidity varies according to trading volume and liquidity of the underlying securities, but very liquid ETFs such as SPY, DIA, and QQQQ can be traded pre-market and after-hours with reasonably tight spreads. These characteristics can be important for investors concerned with liquidity risk.

A more subtle advantage is that ETFs, like closed-ended funds, are immune from some market timing problems that have plagued open-ended mutual funds. In these timing attacks, large investors trade in and out of an open ended fund quickly, exploiting minor variances in price in order to profit at the expense of the long-term unit holders. With an ETF (or closed-ended fund) such an operation is not possible--the underlying assets of the fund are not affected by its trading on the market.