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An exchange-traded fund (or ETF) is an investment vehicle traded on stock exchanges, much like stocks. An ETF holds assets such as stocks or bonds and trades at approximately the same price as the net asset value of its underlying assets over the course of the trading day. Most ETFs track an index, such as the S&P 500 or MSCI EAFE. ETFs may be attractive as investments because of their low costs, tax efficiency, and stock-like features.
An ETF combines the valuation feature of a mutual fund or unit investment trust, which can be bought or sold at the end of each trading day for its net asset value, with the tradability feature of a closed-end fund, which trades throughout the trading day at prices that may be more or less than its net asset value. Closed-end funds are not considered to be exchange-traded funds, even though they are funds and are traded on an exchange. ETFs have been available in the US since 1993 and in Europe since 1999. ETFs traditionally have been index funds, but in 2008 the U.S. Securities and Exchange Commission began to authorize the creation of actively-managed ETFs.
Because ETFs trade on an exchange, each transaction is subject to a brokerage commission. Commissions depend on the brokerage and which plan is chosen by the customer. For example, a typical flat fee schedule from an online brokerage firm in the United States range from $10 to $20, but can be as low as $3 with discount brokers. Due to this commission cost, the amount invested has a great bearing; someone who wishes to invest $100 per month may have a significant percentage of their investment destroyed immediately, while for someone making a $200,000 investment, the commission cost may be negligible. Generally, mutual funds obtained directly from the fund company itself do not charge a brokerage fee. Thus when low or no-cost transactions are available, ETFs become very competitive.
Most ETFs have a lower expense ratio than comparable mutual funds. Not only does an ETF have lower shareholder-related expenses, but because it does not have to invest cash contributions or fund cash redemptions, an ETF does not have to maintain a cash reserve for redemptions and saves on brokerage expenses. Mutual funds can charge 1% to 3%, or more; index fund expense ratios 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 offer public investors an undivided interest in a pool of securities and other assets and thus are similar in many ways to traditional mutual funds, except that shares in an ETF can be bought and sold throughout the day like stocks on a securities exchange through a broker-dealer. Unlike traditional mutual funds, ETFs do not sell or redeem their individual shares at net asset value, or NAV. Instead, financial institutions purchase and redeem ETF shares directly from the ETF, but only in large blocks, varying in size by ETF from 25,000 to 200,000 shares, called "creation units." Purchases and redemptions of the creation units generally are in kind, with the institutional investor contributing or receiving a basket of securities of the same type and proportion held by the ETF, although some ETFs may require or permit a purchasing or redeeming shareholder to substitute cash for some or all of the securities in the basket of assets.
ETFs offered by Invesco Prowershares:
PowerShares DB Gold Double Short ETN (DZZ)
PowerShares DB Agriculture Double Long ETN (DAG)
PowerShares DB Agriculture Double Short ETN (AGA)
PowerShares DB Base Metals Double Long ETN (BDD)
PowerShares DB Base Metals Double Short ETN (BOM)
PowerShares DB Commodity Double Long ETN (DYY)
PowerShares DB Commodity Double Short ETN (DEE)
PowerShares DB Crude Oil Double Long ETN (DXO)
PowerShares DB Crude Oil Double Short ETN (DTO)
PowerShares DB Gold Double Long ETN (DGP)
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