How do leveraged ETFs (index tracking) set intraday pricing?
Does the price only start the day based on the previous day's rebalancing? No, the tracker will open at the price according to the stock it is tracking.  So for example, if the ETF closed at $10 but the tracked stock continued trading and was priced $15 when the ETF reopened the ETF will open at $15. (Example is for a non-leveraged ETF.)
"Why bother with the ETF? Just trade the options -- at least you have the ability to know what you actually are doing. The ""exotic"" ETFs the let you ""double long"" or short indexes aren't options contracts -- they are just collections of unregulated swaps with no transparency. Most of the short/double long ETFs also only attempt to track the security over the course of one day -- you are supposed to trade them daily. Also, you have no guarantee that the ETFs will perform as desired -- even during the course of a single day. IMO, the simplicity of the ETF approach is deceiving." What JoeTaxpayer means is that you can sell one ETF and buy another that will perform substantially the same during the 30 day wash sale period without being considered substantially the same from a wash sale perspective more easily than you could with an individual stock. For example, you could sell an S&P 500 index ETF and then temporarily buy a DJIA index ETF. As these track different indexes, they are not considered to be substantially the same for wash sale purposes, but for a short term investing period, their performance should still be substantially the same. First, make sure you understand the objective of an ETF.  In some cases, they may use leverage to get a multiple of the index's return that is different than 1.  Some may be ultra funds that go for double the return or double the inverse of the return and thus will try to apply the appropriate leverage to achieve that return. Those that use physical replication can still have a small portion be used to try to minimize the tracking error as there is something to be said for what kind of tracking error do you accept as the fund's returns may differ from the index by some measure. Yes.  For example, if you were to have a fund that had a 50% and -50% return in back to back periods, what would your final return be?  Answer: -25%, which if you need to visualize this, take $1 that then becomes $1.50 by going up 50% and then becomes $.75 by going down 50% in a compounded fashion.  This is where you have to be careful of the risks of leverage as those returns will compound in a possibly negative way. For most people, you don't want individual bonds. Unless you are investing very significant amounts of money, you are best off with bond funds (or ETFs). Here in Canada, I chose TDB909, a mutual fund which seeks to roughly track the DEX Universe Bond index. See the Canadian Couch Potato's recommended funds. Now, you live in the U.S. so would most likely want to look at a similar bond fund tracking U.S. bonds. You won't care much about Canadian bonds. In fact, you probably don't want to consider foreign bonds at all, due to currency risk. Most recommendations say you want to stick to your home country for your bond investments. Some people suggest investing in junk bonds, as these are likely to pay a higher rate of return, though with an increased risk of default. You could also do fancy stuff with bond maturities, too. But in general, if you are just looking at an 80/20 split, if you are just looking for fairly simple investments, you really shouldn't. Go for a bond fund that just mirrors a big, low-risk bond index in your home country. I mean, that's the implication when someone recommends a 60/40 split or an 80/20 split. Should you go with a bond mutual fund or with a bond ETF? That's a separate question, and the answer will likely be the same as for stock mutual funds vs stock ETFs, so I'll mostly ignore the question and just say stick with mutual funds unless you are investing at least $50,000 in bonds. More importantly, index funds are denominated in specific currencies. You can't buy or sell an index, so it can be dimensionless. Anything you actually do to track the index involves real amounts of real money. Mutual funds are collections of investments that other people pay to join.  It would be simpler to calculate the value of all these investments at one time each day, and then to deem that any purchases or sales happen at that price.  The fund diversifies rather than magnifies risk, looking to hold rather than enjoy a quick turnaround.  Nobody really needs hourly updated price information for an investment they intend to hold for decades. They quote their prices on a daily basis and you take the daily price.  This makes sense for a vehicle that is a balanced collection of many different assets, most of which will have varying prices over the course a day.  That makes pricing complicated.  This primer explains mutual fund pricing and the requirements of the Investment Company Act of 1940, which mandates daily price reporting.  It also illustrates the complexity: How does the fund pricing process work? Mutual fund pricing is an intensive process that takes place in a short time frame at the end of the day. Generally, a fund’s pricing process begins at the close of the New York Stock Exchange, normally 4 p.m. Eastern time. The fund’s accounting agent, which may be an affiliated entity such as the fund’s adviser, or a third-party servicer such as the fund’s administrator or custodian bank, is usually responsible for calculating the share price. The accounting agent obtains prices for the fund’s securities from pricing services and directly from brokers. Pricing services collect securities prices from exchanges, brokers, and other sources and then transmit them to the fund’s accounting agent. Fund accounting agents internally validate the prices received by subjecting them to various control procedures. For example, depending on the nature and extent of its holdings, a fund may use one or more pricing services to ensure accuracy. Note that under Rule 22c-1 forward pricing, fund shareholders receive the next daily price, not the last daily price.  Forward pricing makes sense if you want shareholders to get the most accurate sale or purchase price, but not if you want purchasers and sellers to be able to make precise calculations about gains and losses (how can you be precise if the price won't be known until after you buy or sell?). The article links to William Bernstein’s plan that he outlined for Business Insider, which says: Modelling this investment strategy Picking three funds from Google and running some numbers. The international stock index only goes back to April 29th 1996, so a run of 21 years was modelled.  Based on 15% of a salary of $550 per month with various annual raises: Broadly speaking, this investment doubles the value of the contributions over two decades. Note:  Rebalancing fees are not included in the simulation. Below is the code used to run the simulation.  If you have Mathematica you can try with different funds.    Notice above how the bond index (VBMFX) preserves value during the 2008 crash.  This illustrates the rationale for diversifying across different fund types. Exchange-traded funds are bought and sold like stocks so you'd be able to place stop orders on them just like you could for individual stocks. For example, SPY would be the ticker for an S & P 500 ETF known as a SPDR. Open-end mutual funds don't have stop orders because of how the buying and selling is done which is on unknown prices and often in fractional shares. For example, the Vanguard 500 Index Investor shares(VFINX) would be an example of an S & P 500 tracker here.