Exchange-Traded Fund (ETF)
What is Exchange-Traded Fund (ETF)?
An ETF is a basket of securities that trades on a stock exchange like a single stock, often tracking an index.
ETFs give instant diversification at low cost and can be bought and sold throughout the trading day, unlike traditional mutual funds. Index ETFs that track the S&P 500 are a popular, low-fee way to invest.
Exchange-Traded Fund (ETF): a worked example
Suppose you put $20,000 into a broad-market index ETF charging an expense ratio of 0.04%. That is $8 a year, taken out of the fund's assets rather than billed to you. A comparable actively managed mutual fund charging 0.85% would take $170 a year on the same balance, a gap of $162, more than twenty times what holding the ETF costs for the whole year. The ETF also trades intraday: if the market drops mid-morning you can sell at that moment's quote, while the mutual fund fills your order at the closing value whatever it turns out to be.
The mistake students make with exchange-traded fund (etf)
ETF gets treated as a synonym for cheap index fund. ETF describes the wrapper, how the fund is structured and traded, not what sits inside it. Actively managed ETFs exist, so do single-sector ETFs and leveraged ones that reset daily and can lose money across a month when the index they track ends flat. The confusion is understandable because the biggest ETFs are low-fee index trackers, but the ticker does not tell you the strategy. Check the expense ratio and the holdings.
Exchange-Traded Fund (ETF) questions
What is the difference between an ETF and a mutual fund?
An ETF trades on an exchange throughout the day at whatever price buyers and sellers agree on, while a mutual fund fills every order once a day at the closing net asset value. ETFs usually carry lower expense ratios, have no minimum beyond the price of one share, and their creation and redemption mechanism tends to hand holders fewer taxable distributions. Mutual funds make automatic fixed-dollar contributions easier, which ETFs manage only where the broker supports fractional shares.
Can you lose money in an ETF?
You can lose money in an ETF, because it holds the same securities that fall when the market falls. Spreading across hundreds of holdings removes the risk that one company collapses; it does not remove the risk that the whole index drops. Narrow funds are riskier still, since a single-sector ETF moves with that sector alone, and a leveraged ETF can end a choppy month down even when its index finishes unchanged.
How does an ETF stay close to the value of what it holds?
An ETF tracks the value of its holdings through authorized participants, large firms permitted to create and redeem shares in bulk directly with the fund. When the ETF trades above the value of its basket, those firms hand over the underlying securities, receive new ETF shares, and sell them, which pushes the price back down. The same arbitrage runs in reverse at a discount, and it operates all day long.
Related terms
Common comparisons
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