What is the difference between shares and ETF?
A mutual fund has several classes of shares that are charged different fees. Some shares are sold through brokers and carry a sales charge (called load) that compensates the broker in lieu of a fee that the broker would charge the client for the service.  Vanguard does not have sales charge on its funds and you don't need to go through a broker to buy its shares; you can buy directly from them.  Admiral shares of Vanguard funds are charged lower annual expenses than regular shares (yes, all mutual funds charge expenses for fund adninistration that reduce the return that you get, and Vanguard has some of the lowest expense ratios) but Admiral shares are available only for large investments, typically $50K or so.  If you have invested in a Vanguard mutual fund, your shares can be set to automatically convert to Admiral shares when the investment reaches the right level. A mutual fund manager can buy and sell stocks to achieve the objectives of the fund, so what stockes you are invested in as a share holder in a mutual fund will typically be unknown to you on a day-to-day basis.  On the other hand, Exchange-traded funds (ETFs) are fixed baskets of stocks, and you can buy shares in the ETF.  These shares are bought and sold through a broker (so you pay a transaction fee each time) but expenses are lower since there is no manager to buy and sell stocks: the basket is fixed. Many ETFs follow specific market indexes (e.g. S&P 500).  Another difference between ETFs and mutual funds is that you can buy and sell ETFs at any time of the day just as if you could if you held stocks. With mutual funds, any buy and sell requests  made during the day are processed at the end of the day and the value of the shares that you buy or sell is determined by the closing price of the stocks held by the mutual fund.  With ETFs, you are getting the intra-day price at the time the buy or sell order is executed by your broker.
Dividends are not paid immediately upon reception from the companies owned by an ETF. In the case of SPY, they have been paid inconsistently but now presumably quarterly. ETFs are legally required to publicly disclose their positions at every point in time. The reason for this is that for an ETF to issue shares of ETF they do NOT take cash in exchange but underlying securities - this is called a creation unit. So people need to know which shares to deliver to the fund to get a share of ETF in exchange. This is never done by retail clients, however, but by nominated market makers. Retail persons will normally trade shares only in the secondary market (ie. on a stock exchange), which does not require new shares of the ETF to be issued. However, they do not normally make it easy to find this information in a digestible way, and each ETF does it their own way. So typically services that offer this information are payable (as somebody has to scrape the information from a variety of sources or incentivise ETF providers to send it to them). If you have access to a Bloomberg terminal, this information is available from there. Otherwise there are paid for services that offer it. Searching on Google for ETF constituent data, I found two companies that offer it: See if you can find what you need there. Good luck. (etfdb even has a stock exposure tool freely available that allows you to see which ETFs have large exposure to a stock of your choosing, see here: http://etfdb.com/tool/etf-stock-exposure-tool/). Since this data is in a table format you could easily download it automatically using table parsing tools for your chosen programming language. PS: Don't bother with underlying index constituents, they are NOT required to be made public and index providers will normally charge handsomely for this so normally only institutional investors will have this information. "A fund is a portfolio, in that it is a collection, so the term is interchangeable for the most part.  Funds are made up of a combination of equities positions (i.e., stocks, bonds, etc.) plus some amount of un-invested cash. Most of the time, when people are talking about a ""fund"", they are describing what is really an investment strategy.  In other words, an example would be a ""Far East Agressive"" fund (just a made up name for illustration here), which focuses on investment opportunities in the Far East that have a higher level of risk than most other investments, thus they provide better returns for the investors.  The ""portfolio"" part of that is what the stocks are that the fund has purchased and is holding on behalf of its investors.  Other funds focus on municipal bonds or government bonds, and the list goes on. I hope this helps. Good luck!" "Here's an example that I'm trying to figure out.  ETF firm has an agreement with GS for blocks of IBM. They have agreed on daily VWAP + 1% for execution price.  Further, there is a commission schedule for 5 mils with GS.  Come month end, ETF firm has to do a monthly rebalance. As such must buy 100,000 shares at IBM which goes for about $100  The commission for the trade is 100,000 * 5 mils = $500 in commission for that trade. I assume all of this is covered in the expense ratio. Such that if VWAP for the day was 100, then each share got executed to the ETF at 101 (VWAP+ %1) + .0005 (5 mils per share) = for a resultant 101.0005 cost basis  The ETF then turns around and takes out (let's say) 1% as the expense ratio ($1.01005 per share)  I think everything so far is pretty straight forward. Let me know if I missed something to this point.  Now, this is what I'm trying to get my head around. ETF firm has a revenue sharing agreement as well as other ""relations"" with GS. One of which is 50% back on commissions as soft dollars. On top of that GS has a program where if you do a set amount of ""VWAP +"" trades you are eligible for their corporate well-being programs and other ""sponsorship"" of ETF's interests including helping to pay for marketing, rent, computers, etc.   Does that happen? Do these disclosures exist somewhere?" "Back in the olden days, if you wanted to buy the S&P, you had to have a lot of money so you can buy the shares. Then somebody had the bright idea of making a fund that just buys the S&P, and then sells small pieces of it to investor without huge mountains of capital. Enter the ETFs. The guy running the ETF, of course, doesn't do it for free. He skims a little bit of money off the top. This is the ""fee"". The major S&P ETFs all have tiny fees, in the percents of a percent. If you're buying the index, you're probably looking at gains (or losses) to the tune of 5, 10, 20% - unless you're doing something really silly, you wouldn't even notice the fee. As often happens, when one guy starts doing something and making money, there will immediately be copycats. So now we have competing ETFs all providing the same service. You are technically a competitor as well, since you could compete with all these funds by just buying a basket of shares yourself, thereby running your own private fund for yourself. The reason this stuff even started was that people said, ""well why bother with mutual funds when they charge such huge fees and still don't beat the index anyway"", so the index ETFs are supposed to be a low cost alternative to mutual funds. Thus one thing ETFs compete on is fees: You can see how VOO has lower fees than SPY and IVV, in keeping with Vanguard's philosophy of minimal management (and management fees). Incidentally, if you buy the shares directly, you wouldn't charge yourself fees, but you would have to pay commissions on each stock and it would destroy you - another benefit of the ETFs. Moreover, these ETFs claim they track the index, but of course there is no real way to peg an asset to another. So they ensure tracking by keeping a carefully curated portfolio. Of course nobody is perfect, and there's tracking error. You can in theory compare the ETFs in this respect and buy the one with the least tracking error. However they all basically track very closely, again the error is fractions of the percent, if it is a legitimate concern in your books then you're not doing index investing right. The actual prices of each fund may vary, but the price hardly matters - the key metric is does it go up 20% when the index goes up 20%? And they all do. So what do you compare them on? Well, typically companies offer people perks to attract them to their own product. If you are a Fidelity customer, and you buy IVV, they will waive your commission if you hold it for a month. I believe Vanguard will also sell VOO for free. But for instance Fidelity will take commission from VOO trades and vice versa. So, this would be your main factor. Though, then again, you can just make an account on Robinhood and they're all commission free. A second factor is reliability of the operator. Frankly, I doubt any of these operators are at all untrustworthy, and you'd be buying your own broker's ETF anyway, and presumably you already went with the most trustworthy broker. Besides that, like I said, there's trivial matters like fees and tracking error, but you might as well just flip a coin. It doesn't really matter." The trend in ETFs is total return: where the ETF automatically reinvests dividends.  This philosophy is undoubtedly influenced by that trend. The rich and retired receive nearly all income from interest, dividends, and capital gains; therefore, one who receives income exclusively from dividends and capital gains must fund by withdrawing dividends and/or liquidating holdings. For a total return ETF, the situation is even more limiting: income can only be funded by liquidation. The expected profit is lost for the dividend as well as liquidating since the dividend can merely be converted back into securities new or pre-existing.  In this regard, dividends and investments are equal. One who withdraws dividends and liquidates holdings should be careful not to liquidate faster than the rate of growth. This ETFchannel.com page shows which ETFs hold Wells Fargo and you can search other stocks the get the same information on that site. This the same information for Google This even tells you what percentage of an ETF is a particular stock.  Be warned that this site is not entirely free. You will be limited to 6 pages in 6 hours unless you pay for a subscription. Additionally ETFdb.com offers a similar tool. "Does the bolded sentence apply for ETFs and ETF companies? No, the value of an ETF is determined by an exchange and thus the value of the share is whatever the trading price is. Thus, the price of an ETF may go up or down just like other securities. Money market funds can be a bit different as the mutual fund company will typically step in to avoid ""Breaking the Buck"" that could happen as a failure for that kind of fund. To wit,   must ETF companies invest a dollar in the ETF for every dollar that an   investor deposited in this aforesaid ETF? No, because an ETF is traded as shares on the market, unless you are using the creation/redemption mechanism for the ETF, you are buying and selling shares like most retail investors I'd suspect. If you are using the creation/redemption system then there are baskets of other securities that are being swapped either for shares in the ETF or from shares in the ETF." Price, whether related to a stock or ETF, has little to do with anything.  The fund or company has a total value and the value is distributed among the number of units or shares.   Vanguard's S&P ETF has a unit price of $196 and Schwab's S&P mutual fund has a unit price of $35, it's essentially just a matter of the fund's total assets divided by number of units outstanding. Vanguard's VOO has assets of about $250 billion and Schwab's SWPPX has assets of about $25 billion. Additionally, Apple has a share price of $100, Google has a share price of $800, that doesn't mean Google is more valuable than Apple.  Apple's market capitalization is about $630 billion while Google's is about $560 billion.  Or on the extreme a single share of Berkshire's Class A stock is $216,000, and Berkshire's market cap is just $360 billion.   It's all just a matter of value divided by shares/units. First, it's not always the case that ETFs have lower expenses than the equivalent mutual funds.  For example, in the Vanguard family of funds the expense ratio for the ETF version is the same as it is for the Admiral share class in the mutual fund version.  With that in mind, the main advantages of a mutual fund over an equivalent ETF are: From a long-term investor's point of view, the main disadvantage of mutual funds relative to ETFs is the minimum account sizes.  Especially if the fund has multiple share classes (i.e., where better classes get lower expense ratios), you might have to have quite a lot of money invested in the fund in order to get the same expense ratio as the ETF.   There are some other differences that matter to more active investors (e.g., intraday trading, options, etc.), but for a passive investor the ones above are the major ones.  Apart from those mutual funds and ETFs are pretty similar.  Personally, I prefer mutual funds because I'm at a point where the fund minimums aren't really an issue, and I don't want to deal with the more fiddly aspects of ETFs. For investors just starting out the lower minimum investment for an ETF is a big win, as long as you can get commission-free trades (which is what I've assumed above.) Questrade is a Canada based broker offering US stock exchange transactions as well. It says this right on their homepage. ETFs are traded like stocks, so the answer is yes.  Why did you think they only offered funds? The literal answer to your question 'what determines the price of an ETF' is 'the market'; it is whatever price a buyer is willing to pay and a seller is willing to accept. But if the market price of an ETF share deviates significantly from its NAV, the per-share market value of the securities in its portfolio, then an Authorized Participant can make an arbitrage profit by a transaction (creation or redemption) that pushes the market price toward NAV. Thus as long as the markets are operating and the APs don't vanish in a puff of smoke we can expect price will track NAV. That reduces your question to: why does NAV = market value of the holdings underlying a bond ETF share decrease when the market interest rate rises?  Let's consider an example. I'll use US Treasuries because they have very active markets, are treated as risk-free (although that can be debated), and excluding special cases like TIPS and strips are almost perfectly fungible. And I use round numbers for convenience. Let's assume the current market interest rate is 2% and 'Spindoctor 10-year Treasury Fund' opens for business with $100m invested (via APs) in 10-year T-notes with 2% coupon at par and 1m shares issued that are worth $100 each. Now assume the interest rate goes up to 3% (this is an example NOT A PREDICTION); no one wants to pay par for a 2% bond when they can get 3% elsewhere, so its value goes down to about 0.9 of par (not exactly due to the way the arithmetic works but close enough) and Spindoctor shares similarly slide to $90. At this price an investor gets slightly over 2% (coupon*face/basis) plus approximately 1% amortized capital gain (slightly less due to time value) per year so it's competitive with a 3% coupon at par.  As you say new bonds are available that pay 3%. But our fund doesn't hold them; we hold old bonds with a face value of $100m but a market value of only $90m. If we sell those bonds now and buy 3% bonds to (try to) replace them, we only get $90m par value of 3% bonds, so now our fund is paying a competitive 3% but NAV is still only $90.  At the other extreme, say we hold the 2% bonds to maturity, paying out only 2% interest but letting our NAV increase as the remaining term (duration) and thus discount of the bonds decreases -- assuming the market interest rate doesn't change again, which for 10 years is probably unrealistic (ignoring 2009-2016!). At the end of 10 years the 2% bonds are redeemed at par and our NAV is back to $100 -- but from the investor's point of view they've forgone $10 in interest they could have received from an alternative investment over those 10 years, which is effectively an additional investment, so the original share price of $90 was correct. Behind the scenes, mutual funds and ETFs are very similar.  Both can vary widely in purpose and policies, which is why understanding the prospectus before investing is so important. Since both mutual funds and ETFs cover a wide range of choices, any discussion of management, assets, or expenses when discussing the differences between the two is inaccurate.  Mutual funds and ETFs can both be either managed or index-based,  high expense or low expense, stock or commodity backed. Method of investing When you invest in a mutual fund, you typically set up an account with the mutual fund company and send your money directly to them.  There is often a minimum initial investment required to open your mutual fund account.  Mutual funds sometimes, but not always, have a load, which is a fee that you pay either when you put money in or take money out. An ETF is a mutual fund that is traded like a stock.  To invest, you need a brokerage account that can buy and sell stocks.  When you invest, you pay a transaction fee, just as you would if you purchase a stock.  There isn't really a minimum investment required as there is with a traditional mutual fund, but you usually need to purchase whole shares of the ETF.  There is inherently no load with ETFs. Tax treatment Mutual funds and ETFs are usually taxed the same.  However, capital gain distributions, which are taxable events that occur while you are holding the investment, are more common with mutual funds than they are with ETFs, due to the way that ETFs are structured.  (See Fidelity: ETF versus mutual funds: Tax efficiency for more details.)  That having been said, in an index fund, capital gain distributions are rare anyway, due to the low turnover of the fund. Conclusion When comparing a mutual fund and ETF with similar objectives and expenses and deciding which to choose, it more often comes down to convenience.  If you already have a brokerage account and you are planning on making a one-time investment, an ETF could be more convenient.  If, on the other hand, you have more than the minimum initial investment required and you also plan on making additional regular monthly investments, a traditional no-load mutual fund account could be more convenient and less expensive. "ETFs purchases are subject to a bid/ask spread, which is the difference between the highest available purchase offer (""bid"") and the lowest available sell offer (""ask""). You can read more about this concept here. This cost doesn't exist for mutual funds, which are priced once  per day, and buyers and sellers all use the same price for transactions that day. ETFs allow you to trade any time that the market is open. If you're investing for the long term (which means you're not trying to time your buy/sell orders to a particular time of day), and the pricing is otherwise equal between the ETF and the mutual fund (which they are in the case of Vanguard's ETFs and Admiral Shares mutual funds), I would go with the mutual fund because it eliminates any cost associated with bid/ask spread." "I think that any ETF is ""open source"" -- the company issues a prospectus and publishes the basket of stocks that make up the index. The stuff that is proprietary are trading strategies and securities or deriviatives that aren't traded on the open market. Swaps, venture funds, hedge funds and other, more ""exotic"" derivatives are the things that are closed. What do you mean by ""open source"" in this context?"