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exchange-traded fund(ETF), in finance, an investment company that in exchange for the deposit of a portfolio of stocks, bonds, commodities, or other assets issues securities that represent those assets and may be traded like shares of stock. Shares in an ETF may only be issued to the fund's authorized participants, typically large financial institutions, and usually in a large block of 10,000 to 50,000 shares, known as creation units. Shares in an ETF must also be redeemed in creation units. ETF shares may be purchased and traded by most individual investors using a brokerage account.
Most ETFs are similar to index funds (see mutual fundmutual fund,
in finance, investment company or trust that has a very fluid capital stock. It is unique in that at any time it can sell or redeem any of its outstanding shares at net asset value (i.e.
..... Click the link for more information. ) in that they represent a portfolio that is designed to track an index of a financial market, such as the S&P500. ETFs, however, track a greater range of indexes and thus offer more options and more specifically targeted choices for an investor. Unlike shares in a mutual fund, which may be redeemed only at the end of the business day when the net asset value is determined, ETF shares may be bought or sold at any time on an exchange and also may be sold short and purchased on margin, which is useful for traders. In general, compared to mutual funds, ETFs are more useful to the active trader with larger financial resources than to the long-term small investor. The first ETF was created in 1993 in the United States; the number of ETFs and amount of money invested in them grew significantly in the early 21st cent.