Index Funds Open-End Mutual Funds that track an index (Vanguard SP500 Index Funds, 1976)
ETFs (exchange traded funds) Closed end Funds whose traded shares track an index.
SPDR (93) VIPER iSHARES QQQQ
2 Merits of ETFs
ETFs are continuously priced throughout the trading day, whereas mutual fund sales take place at the end of the day price.
In theory, ETFs should be able to more closely track an index than a mutual fund. Index fund managers are confronted with the need to provide liquidity to buyers and sellers of their fund's shares, which requires them to hold a percentage of their assets in cash.
3 Merits of ETFs
Because ETFs trade like a stock, an investor can employ a wider range of trading techniques with them, such as stop loss and limit orders, and short sales. Increasingly, futures and options are becoming available on the more liquid ETFs, which creates more potential trading strategies.
4 Merits of ETFs
The operating expenses on many ETFs tend to be lower than on index mutual funds which track the same index, because ETFs don't provide the same level of service to their owners that mutual fund owners receive (e.g., telephone service centers, free fund transfers, check writing privileges, etc.).
5 Merits of Index Funds
Operating expenses are only part of the story. When you buy an ETF, you also pay a brokerage commission, which you usually avoid when you buy an index mutual fund (which rarely carry front end sales loads).
For people who dollar cost average -- investing an amount of money each month into the index fund or funds they own, the ability to avoid trading commissions makes mutual funds a much better deal over time.
6 Merits of Index funds
If you are a long term, buy and hold investor, the ability to trade ETFs throughout the day, and to employ a wide range of trading strategies really isn't very useful. Mutual fund companies provide a range of services that many discount brokerages do not (this assumes that, in order to minimize sales commissions, people buy ETFs through discount rather than full service stockbrokers).
In practice, many ETFs have had larger tracking errors versus the index than comparable mutual funds.
7 REIT ETFs
REITs are companies that own and manage properties in subsectors such as apartments, malls, warehouses and offices. As an asset class, REITs can reduce portfolio risk, since they tend not to move in step with stocks and bonds.
8 Merits
As a portfolio diversifier, however, REITs can provide the right stuff in choppy stock markets. For example, the MSCI REIT index added 26.8 in 2000 while the Standard Poor's 500 Index fell 9.1.
When stocks are strong, however, REITs tend to weaken. The SP gained 21 in 1999, while the REIT index lost 4.6.
9 Some REIT ETFs
ETF investors can choose among four REIT offerings, each tracking a different index StreetTracks Wilshire REIT Vanguard REIT Index Vipers iShares Cohen Steers Realty Majors, and iShares Dow Jones U.S. Real Estate.
The iShares fund tracking the Cohen Steers index has the fewest number of stocks, with 31 holdings, and focuses more on the large-cap segment of the market.