A quick comparison of similarities and differences between the two

It's important for investors to understand the key differences between traditional mutual funds (open-end) and exchange-traded funds (ETFs). Each has its advantages and disadvantages. This knowledge can translate into making intelligent investment decisions. Let's focus on the key points.

Fees

The expense ratios of ETFs are generally lower versus active mutual funds. In some cases, this includes even index mutual funds. Also, ETFs often have lower trading costs versus actively managed funds, due to their low portfolio turnover. The ETF cost savings can be significant, especially for long-term investors. Investing in ETFs will usually result in a brokerage commission, but the savings from lower expense ratios can help to offset these transaction costs. Information on specific fees, charges, and expenses is obtained in the fund prospectus.

Fund Transparency and NAV

Actively managed mutual funds report their holdings on a quarterly or semiannual basis, whereas exchange-traded funds disclose their portfolio holdings on a daily basis. This provides ETF investors with a greater degree of financial transparency. The ETF performance and portfolio composition are a reflection of the underlying index. Consulting the index provider's Website is another method for easily identifying the underlying holdings of an index ETF.

Mutual funds are bought and sold at net asset value (NAV), which is determined by subtracting a fund's liabilities divided by the number of shares outstanding from the value of a fund's total assets. All buy and sell transactions are conducted directly with the fund company. In contrast, ETFs are bought and sold on an exchange based upon market prices, which fluctuate according to supply and demand.

ETFs generally trade close to their net asset value. It's rare to see ETFs trading at a large premium or discount to their NAV, but it can happen. Historically, institutions have seen this as an arbitrage opportunity by creating or liquidating creation units. This process keeps ETF share prices closely hinged to the NAV of the underlying index or basket of securities.

Taxes and Portfolio Turnover

Annually, both mutual funds and ETFs are required to distribute dividends and portfolio gains to shareholders. This is usually done at the end of each year and these distributions can be caused by index rebalancing, diversification rules, or other factors. Also, anytime you sell your fund this could generate tax consequences.

(1) For employer sponsored retirement plans ETFs may not be available as an investment option. Self-directed retirement plans may offer ETFs and a broader menu of investment choices.
(2) Most mutual funds impose a minimum investment or required dollar commitment, while others wave this requirement.
(3) Exception is Merrill Lynch's HOLDRs, which can only be bought and sold in 100-share increments.