Exchange-traded funds (ETFs) are simpleand efficient to use and offer manyadvantages over other traditional investmentoptions. A fund that is traded like astock but tracked as an index, ETFs can bebought and sold any time of day and aremore tax-efficient than normal mutualfunds. Short-term investors in particularcan enjoy the benefits of ETFs due to theirdiversification, ability to effectively trackthe market, and flexibility in trading.Choosing the right ETF for your investmentneeds may be confusing, since there arecurrently more than 150 ETFs. Fortunately,Morningstar.com offers a helpful ETFscreener that simplifies the search for yourbest fund. By using the screener, you cannarrow the ETF field based on your precisecriteria. If you're only interested in a specifictype of ETF, the screener will narrowfund results only in that sector. Althoughyou can find many helpful tools and a glutof information about ETFs on the Web, youshould consult your financial advisor anddesign a proper ETF strategy.