Does a bond etf drop by the amount of the dividend just like an equity etf
No, they do not. Stock funds and bonds funds collect income dividends in different   ways. Stock funds collect dividends  (as well as any capital gains   that are realized) from the underlying stocks  and incorporates these   into the funds’ net asset value, or daily share price. That’s why a   stock fund’s share price drops when the fund makes a distribution –   the distribution comes out of the fund’s total net assets. With bond funds, the internal accounting is different:  Dividends   accrue daily, and are then paid out to shareholders every month or   quarter.  Bond funds collect the income from the underlying bonds and   keep it in a separate internal “bucket.”  A bond fund calculates a   daily accrual rate for the shares outstanding, and shareholders only   earn income for the days they actually hold the fund.  For example, if   you buy a bond fund two days before the fund’s month-end distribution,   you would only receive two days’ worth of income that month.  On the   other hand, if you sell a fund part-way through the month, you will   still receive a partial distribution at the end of the month,   pro-rated for the days you actually held the fund. Source  Also via bogleheads: Most Vanguard bond funds accrue interest to the share holders daily.   Here is a typical statement from a prospectus: Each Fund distributes to shareholders virtually all of its net income   (interest less expenses) as well as any net capital gains realized   from the sale of its holdings. The Fund’s income dividends accrue   daily and are distributed monthly. The term accrue used in this sense   means that the income dividends are credited to your account each day,   just like interest in a savings account that accrues daily. Since the   money set aside for your dividends is both an asset of the fund and a   liability, it does not affect the calculated net asset value. When the   fund distributes the income dividends at the end of the month, the net   asset value does not change as both the assets and liabilities   decrease by exactly the same amount. [Note that if you sell all of   your bond fund shares in the middle of the month, you will receive as   proceeds the value of your shares (calculated as number of shares   times net asset value) plus a separate distribution of the accrued   income dividends.] Most bond ETFs have switched to monthly dividends paid on the first of each month, in an attempt to standardize across the market.  For ETFs (but perhaps not bond mutual funds, as suggested in the above answer) interest does accrue in the NAV, so the price of the fund does drop on ex-date by an amount equal to the dividend paid. A great example of this dynamic can be seen in FLOT, a bond ETF holding floating rate corporate bonds.  As you can see in this screenshot, the NAV has followed a sharp up and down pattern, almost like the teeth of a saw. This is explained by interest accruing in the NAV over the course of each month, until it is paid out in a dividend, dropping the NAV sharply in one day. The effect has been particularly pronounced recently because the floating coupon payments have increased significantly (benchmark interest rates are higher) and mark-to-market changes in credit spreads of the constituent bonds have been very muted. It may be true for a bond fund.  But it is not true for bond etf.  Bond etf will drop by the same amount when it distribute dividend on ex-dividend date.
No. Investors purchase ETFs' as they would any other stock, own it under the same circumstances as an equity investment, collecting distributions instead of dividends or interest. The ETF takes care of the internal operations (bond maturities and turnover, accrued interest, payment dates, etc.). "20-year Treasury Bonds are not equivalent to cash, not even close.  Even though the bonds are backed by the full faith and credit of the U.S. Government, they are long-term debt and therefore their principal value will fluctuate considerably as market interest rates change. When interest rates rise, the market value of 20-year bonds will drop, and drop more than shorter-term bonds would.  Your principal is not protected in the short term.  Principal is only guaranteed returned at the 20-year maturity of those bonds.  But, oops, there is no maturity on the 20-year bond ETFs because every year the ETF rolls the 19-year positions into new 20-year positions! ;-) For an ""equivalent to cash"" piece of a portfolio, I'd want my principal to be intact over the short term, and continually reinvested at the higher short-term rates as rates are rising.  Reinvesting at short-term rates can be an inflation-hedge.  But, money locked in for 20-years is a sitting duck for inflation. Still, inflation aside, why do we want our ""equivalent to cash"" position to be relatively liquid and principal-protected? When it comes time to rebalance your portfolio after disastrous equity and/or bond returns, you've got in your cash component some excess weighting since it was unaffected by the disastrous performance. That excess cash is ready to be deployed to purchase equities and/or bonds at the lower current prices.  Rebalancing from cash can add a bonus to your returns and smooth volatility.  If you have no cash component and only equities and bonds, you have no money to deploy when both equities and bonds are depressed.  You didn't keep any powder dry.  And, BTW, I would personally keep a bit more than 3% of my powder dry. Consider a short-term cash deposit or good money-market fund for your ""equivalent to cash"" position." You can check the website for the company that manages the fund. For example, take the iShares Nasdaq Biotechnology ETF (IBB). iShares publishes the complete list of the fund's holdings on their website. This information isn't always easy to find or available, but it's a place to start. For some index funds, you should just be able to look up the index the fund is trying to match. This won't be perfect (take Vanguard's S&P 500 ETF (VOO); the fund holds 503 stocks, while the S&P 500 index is comprised of exactly 500), but once again, it's a place to start. A few more points to keep in mind. Remember that many ETF's, including equity ETF's, will hold a small portion of their assets in cash or cash-equivalent instruments to assist with rebalancing. For index funds, this may not be reflected in the index itself, and it may not show up in the list of holdings. VOO is an example of this. However, that information is usually available in the fund's prospectus or the fund's site. Also, I doubt that many stock ETF's, at least index funds, change their asset allocations all that frequently. The amounts may change slightly, but depending on the size of their holdings in a given stock, it's unlikely that the fund's manager would drop it entirely. "I think you are asking about actively managed funds vs. indexes and possibly also vs. diversified funds like target date funds. This is also related to the question of mutual fund vs. ETF. First, a fund can be either actively managed or it can attempt to track an index. An actively managed fund has a fund manager who tries to find the best stocks to invest in within some constraints, like ""this fund invests in large cap US companies"". An index fund tries to match as closely as possible the performance of an index like the S&P 500. A fund may also try to offer a portfolio that is suitable for someone to put their entire account into. For example, a target date fund is a fund that may invest in a mix of stocks, bonds and foreign stock in a proportion that would be appropriate to someone expecting to retire in a certain year. These are not what people tend to think of as the canonical examples of mutual funds, even though they share the same legal structure and investment mechanisms. Secondly, a fund can either be a traditional mutual fund or it can be an exchange traded fund (ETF). To invest in a traditional mutual fund, you send money to the fund, and they give you a number of shares equal to what that money would have bought of the net asset value (NAV) of the fund at the end of trading on the day they receive your deposit, possibly minus a sales charge. To invest in an ETF, you buy shares of the ETF on the stock market like any other stock. Under the covers, an ETF does have something similar to the mechanism of depositing money to get shares, but only big traders can use that, and it's not used for investing, but only for people who are making a market in the stock (if lots of people are buying VTI, Big Dealer Co will get 100,000 shares from Vanguard so that they can sell them on the market the next day). Historically and traditionally, ETFs are associated with an indexing strategy, while if not specifically mentioned, people assume that traditional mutual funds are actively managed. Many ETFs, notably all the Vanguard ETFs, are actually just a different way to hold the same underlying fund. The best way to understand this is to read the prospectus for a mutual fund and an ETF. It's all there in reasonably plain English." "The amount, reliability and frequency of dividends paid by an ETF other than a stock, such as an index or mutual fund, is a function of the agreement under which the ETF was established by the managing or issuing company (or companies), and the ""basket"" of investments that a share in the fund represents.  Let's say you invest in a DJIA-based index fund, for instance Dow Diamonds (DIA), which is traded on several exchanges including NASDAQ and AMEX. One share of this fund is currently worth $163.45 (Jan 22 2014 14:11 CDT) while the DJIA itself is $16,381.38 as of the same time, so one share of the ETF represents approximately 1% of the index it tracks. The ETF tracks the index by buying and selling shares of the blue chips proportional to total invested value of the fund, to maintain the same weighted percentages of the same stocks that make up the index. McDonald's, for instance, has an applied weight that makes the share price of MCD stock roughly 5% of the total DJIA value, and therefore roughly 5% of the price of 100 shares of DIA. Now, let's say MCD issued a dividend to shareholders of, say, $.20 per share. By buying 100 shares of DIA, you own, through the fund, approximately five MCD shares, and would theoretically be entitled to $1 in dividends. However, keep in mind that you do not own these shares directly, as you would if you spent $16k buying the correct percentage of all the shares directly off the exchange. You instead own shares in the DIA fund, basically giving you an interest in some investment bank that maintains a pool of blue-chips to back the fund shares. Whether the fund pays dividends or not depends on the rules under which that fund was set up. The investment bank may keep all the dividends itself, to cover the expenses inherent in managing the fund (paying fund management personnel and floor traders, covering losses versus the listed price based on bid-ask parity, etc), or it may pay some percentage of total dividends received from stock holdings. However, it will virtually never transparently cut you a check in the amount of your proportional holding of an indexed investment as if you held those stocks directly. In the case of the DIA, the fund pays dividends monthly, at a yield of 2.08%, virtually identical to the actual weighted DJIA yield (2.09%) but lower than the per-share mean yield of the ""DJI 30"" (2.78%). Differences between index yields and ETF yields can be reflected in the share price of the ETF versus the actual index; 100 shares of DIA would cost $16,345 versus the actual index price of 16,381.38, a delta of $(36.38) or -0.2% from the actual index price. That difference can be attributed to many things, but fundamentally it's because owning the DIA is not the exact same thing as owning the correct proportion of shares making up the DJIA. However, because of what index funds represent, this difference is very small because investors expect to get the price for the ETF that is inherent in the real-time index." There have been many interesting and correct answers but to give a direct answer to your first question, dividend yield is simply dividend over current share price. So, if the share price drops, your dividend yield increases proportionately. Dividend yield is not something one should use as the only source of information of whether a stock is a good/bad buy. It does not show many important factors: the riskiness of the company business, its financial position, profitability, ability to generate cash. Furthermore, dividend yield is just a snapshot of an income gain at a given point in time. It does not mean that this very dividend policy is going to continue in the future (especially not so if the company finances this dividend payments using not its own cash reserves but outside capital by issuing debt securities, which is unsustainable). See http://blogs.reuters.com/felix-salmon/2011/04/30/why-the-sec-should-look-at-levered-etfs/?dlvrit=60132, http://symmetricinfo.org/2011/04/are-investors-in-levered-short-treasury-etfs-a-disaster-waiting-to-happen-pt1/, and the articles linked from it: The issue with holding a levered ETF past 1 day is that investors expose themselves to path dependency in the underlying.... The reason for the difference in payouts comes from the fact that the manager of the levered ETF promises you a multiple of the daily returns of the underlying. To be able to promise you these daily returns, the ETF manager has to buy/sell some of the underlying every day to position himself to have a constant leverage ratio the next day. The short video below explains this process in detail for a 2x long ETF, but the same result holds for a 2x short ETF: the manager has to buy more of the underlying on a day when the underlying increases in value and sell more of the underlying when the underlying goes down in value . The simple answer is technically bonds don't have earnings, hence no P/E. What I think the OP is really asking how do I compare stock and bond ETFs. Some mature stocks exhibit very similar characteristics to bonds, so at the margin if you are considering investing between 2 such investments that provide stable income in the form of dividends, you might want to use the dividend/price ratio (D/P) of the stock and compare it to the dividend yield of the bond. If you go down to the basics, both the bond and the stock can be considered  the present value of all future expected cashflows. The cash that accrues to the owner of the stock is future dividends and for the bond is the coupon payments. If a company were to pay out 100% of its earnings, then the dividend yield D/P would be conveniently E/P. For a company with P/E of 20 that paid out it's entire earnings, one would expect D/P = 1/20 = 5% This serves as a decent yard stick in the short term ~ 1 year to compare mature stock etfs with stable prospects vs bond funds since the former will have very little expected price growth (think utilities), hence they both compete on the cashflows they throw off to the investor. This comparison stops being useful for stock ETFs with higher growth prospects since expected future cashflows are much more volatile. This comparison is also not valid in the long term since bond ETFs are highly sensitive to the yield curve (interest rate risk) and they can move substantially from where they are now.