How can I find the historical stock price for a specific stock on a specific date?
Go to a large reference library and ask to see the Wall Street Journal for October 13 1992. I've had luck finding old stock information in the Google scanned newspaper archives. Unfortunately there does not appear to be a way to search exactly by date, but a little browsing /experimenting should get what you want. For instance, here's a source which shows the price to be 36 3/4 (as far as I can read anyway) on that date. A quick search showed me that UEP merged into Ameren on Dec 31, 1997, and Ameren still exists today.  So I took a look at Ameren's Investor Relations website.   Unfortunately, they don't provide historical stock prices prior to Ameren forming, so starting with 1998.  However, I've had good luck in the past emailing a company's investor relations contact and asking for data like this that isn't on the website.  It's reasonably likely they'll have internal records they could look it up within.
"Certainly no one knows in advance how much a stock is going to swing around. However, there are measures of how much it has swung around in the past, and there are people who will estimate the probability. First of all, there's a measure of an individual stock's volatility, commonly referred to as ""beta"". A stock with a beta of 1 tends to rise and fall about as much as the market at large. A stock with a beta of 2, in the meantime, would rise 10% when the market is up 5%. These are, of course, historical averages. See Wikipedia: http://en.wikipedia.org/wiki/Beta_(finance) Secondly, you can get an implied measure of volatility expectations by looking at options pricing. If a stock is particularly volatile, the chance of a big price move will be baked into the price of the stock options. (Note also that other things affect options pricing, such as the time value of money.) For an options-based measure of the volatility of the whole market, see the Volatility Index aka the ""Fear Gauge"", VIX.  Wikipedia: http://en.wikipedia.org/wiki/VIX Chart: http://finance.yahoo.com/q?s=%5EVIX Looking at individual stocks as a group (and there's an oxymoron for you), individual stocks are definitely much more likely to have big moves than the market. Besides Netflix, consider the BP oil spill, or the Tokyo Electric Power Company's Fukushima incident (yow!). I don't have any detailed statistics on quantitatively how much, mind you, but in application, a standard piece of advice says not to put more than 5% of your portfolio in a single company's stock. Diversification protects you. (Alternatively, if you're trying to play Mr. Sophisticated Stock-Picker instead of just buying an index fund, you can also buy insurance through stock options: hedging your bets. Naturally, this will eat up part of your returns if your pick was a good one)." While there are lots of really plausible explanations for why the market moves a certain way on a certain day, no one really knows for sure.  In order to do that, you would need to understand the 'minds' of all the market players.  These days many of these players are secret proprietary algorithms.  I'm not quibbling with the specifics of these explanations (I have no better) just pointing out that these are just really hypotheses and if the market starts following different patterns, they will be tossed into the dust bin of 'old thinking'. I think the best thing you can explain to your son is that the stock market is basically a gigantic highly complex poker game.  The daily gyrations of the market are about individuals trying to predict where the herd is going to go next and then after that and then after that etc. If you want to help him understand the market, I suggest two things.  The first is to find or create a simple market game and play it with him.  The other would be to teach him about how bonds are priced and why prices move the way they do.  I know this might sound weird and most people think bonds are esoteric but there are bonds have a much simpler pricing model based on fundamental financial logic.  It's much easier then to get your head around the moves of the bond markets because the part of the price based on beliefs is much more limited (i.e. will the company be able pay & where are rates going.)  Once you have that understanding, you can start thinking about the different ways stocks can be valued (there are many) and what the market movements mean about how people are valuing different companies. With regard to this specific situation, here's a different take on it from the 'priced in' explanation which isn't really different but might make more sense to your son: Pretend for a second that at some point these stocks did move seasonally.  In the late fall and winter when sales went up, the stock price increased in kind.  So some smart people see this happening every year and realize that if they bought these stocks in the summer, they would get them cheap and then sell them off when they go up.  More and more people are doing this and making easy money.  So many people are doing it that the stock starts to rise in the Summer now.  People now see that if they want to get in before everyone else, they need to buy earlier in the Spring.  Now the prices start rising in the Spring.  People start buying in the beginning of the year... You can see where this is going, right?  Essentially, a strategy to take advantage of well known seasonal patterns is unstable.  You can't profit off of the seasonal changes unless everyone else in the market is too stupid to see that you are simply anticipating their moves and react accordingly. Your question seems to be making assumptions around “investing”, that investing is only about stock market and bonds or similar things. I would suggest that you should look much broader than that in terms of your investments. Investment Types Your should consider (and include) some or all of the following for your investments, depending on your age, your attitude towards risk, the number of dependents you have, your lifestyle, etc. I love @Blackjack’s explanation of diversification into other asset classes producing a lower risk portfolio. Excellent! All the above need to be considered in this spread of risk, depending as I said earlier on your age, your attitude towards risk, the number of dependents you have, your lifestyle, etc. Stock Market Investment I’ll focus most of the rest of my post on the stock markets, as that is where my main experience lies. But the comments are applicable to a greater or lesser extent to other types of investing. We then come to how engaged you want to be with your investments. Two general management styles are passive investment management versus active investment management. @Blackjack says  That pretty much sums up passive management. The idea is to buy ETFs   across asset classes and just leave them. The difficulty with this idea is that profitability is very dependent upon when the stocks are purchased and when they are sold. This is why active investing should be considered as a viable alternative to passive investment.  I don’t have access to a very long time frame of stock market data, but I do have 30 or so years of FTSE data, so let’s say that we invest £100,000 for 10 years by buying an ETF in the FTSE100 index. I know this isn't de-risking across a number of asset classes by purchasing a number of different EFTs, but the logic still applies, if you will bear with me. Passive Investing I have chosen my example dates of best 10 years and worst 10 years as specific dates that demonstrate my point that active investing will (usually) out-perform passive investing. From a passive investing point of view, here is a graph of the FTSE with two purchase dates chosen (for maximum effect), to show the best and worst return you could receive. Note this ignores brokerage and other fees. In these time frames of data I have …   These are contrived dates to illustrate the point, on how ineffective passive investing can be, depending if there is a bear/bull market and where you buy in the cycle.  One obviously wouldn’t buy all their stocks in one tranche, but I’m just trying to illustrate the point. Active Investing Let’s consider now active investing. I use the following rules for selling and buying:- This is obviously a very simple technical trading system and I would not recommend using it to trade with, as it is overly simplistic and there are some flaws and inefficiencies in it. So, in my simulation,  These beat the passive stock market profit for their respective dates. Summary Passive stock market investing is dependent upon the entry and exit prices on the dates the transactions are made and will trade regardless of market cycles. Active stock market trading or investing engages with the market using a set of criteria, which can change over time, but allows one’s investments to be in or out of the market at any point in time. My time frames were arbitrary, but with the logic applied (which is a very simple technical trading methodology), I would suggest that any 10 year time frame active investing would beat passive investing. "As you've observed, when you're dealing with that amount of money, you're going to have to give up FDIC guarantees. That means that keeping the money in a bank account carries some risk with it: if that particular bank goes bust, you could lose most of your money. There are a few options to stretch the FDIC limit such as CDARS, but likely can't handle your hypothetical $800 million. So, what's a lucky winner to do? There are a few options, including treasury securities, money market funds, and more general capital investments such as stocks and bonds. Which one(s) are best depend on what your goals are, and what kind of risks you find acceptable. Money in the bank has two defining characteristics: its value is very stable, and it is liquid (meaning you can spend it very easily, whenever you want, without incurring costs). Treasury securities and money market funds each focus on one of these characteristics. A treasury security is a piece of paper (or really, an electronic record) saying that the US Federal Government owes you money and when they will pay it back. They are very secure in that the government has never missed a payment, and will move heaven and earth to make sure they won't miss one in the future (even taking into account recent political history). You can buy and sell them on an open market, either through a broker or directly on the Treasury's website. The major downside of these compared to a bank account is that they're not as liquid as cash: you own specific amounts of specific kinds of securities, not just some number of dollars in an account. The government will pay you guaranteed cash on specified dates; if you need cash on different dates, you will need to sell the securities in the open market and the price will be subject to market fluctuations. The other ""cash-like"" option is money market funds. These are a type of mutual fund offered by financial companies. These funds take your money and spread it out over a wide variety of very low risk, very short term investments, with the goal of ensuring that the full value will never go down and is available at any time. They are very liquid: you can typically transfer cash quickly and easily to a normal bank account, write checks directly, and sometimes even use ""online bill pay""-like features. They have a very good track record for stability, too, but no one is guaranteeing them against something going terribly wrong. They are lower risk than a (non-FDIC-insured) bank account, since the investments are spread out across many institutions. Beyond those two somewhat ""cash-like"" options, there are of course other, more general investments such as stocks, bonds, and real estate. These other options trade away some degree of stability, liquidity, or both, in exchange for better expected returns." Dow Jones: http://en.wikipedia.org/wiki/Historical_components_of_the_Dow_Jones_Industrial_Average  NASDAQ: http://en.wikipedia.org/wiki/NASDAQ-100 (scroll down) S&P Tricky. From what I can find, you need to be in Harvard Business School, a member of CRSP, or have access to Bloomberg's databases. S&P did have the info available years ago, but no longer that I can find. The last column in the source data is volume (the number of stocks that was exchanged during the day), and it also has a value of zero for that day, meaning that nobody bought or sold the stocks on that day. And since the prices are prices of transactions (the first and the last one on a particular day, and the ones with the highest/lowest price), the prices cannot be established, and are irrelevant as there was not a single transaction on that day. Only the close price is assumed equal to its previous day counterpart because this is the most important value serving as a basis to determine the daily price change (and we assume no change in this case). Continuous-line charts also use this single value. Bar and candle charts usually display a blank space for a day where no trade occurred. "Stock price is set to the price with the highest transaction volume at any given time.  The stock price you cited was only valid in the last transaction on a specific stock exchange. As such it is more of an ""historic"" value. Next trade will be done with the next biggest volume. Depending on the incoming bids and asks this could be higher or lower, but you can assume it will not be too far off if there is no crash underway. Simple example stock exchange:" "Wouldn't this be part of your investing strategy to know what price is considered a ""good"" price for the stock?  If you are going to invest in company ABC, shouldn't you have some idea of whether the stock price of $30, $60, or $100 is the bargain price you want?  I'd consider this part of the due diligence if you are picking individual stocks.  Mutual funds can be a bit different in automatically doing fractional shares and not quite as easy to analyze as a company's financials in a sense. I'm more concerned with the fact that you don't seem to have a good idea of what the price is that you are willing to buy the stock so that you take advantage of the volatility of the market. ETFs would be similar to mutual funds in some ways though I'd probably consider the question that may be worth considering here is how much do you want to optimize the price you pay versus adding $x to your position each time.  I'd probably consider estimating a ballpark and then setting the limit price somewhere within that.  I wouldn't necessarily set it to the maximum price you'd be willing to pay unless you are trying to ride a ""hot"" ETF using some kind of momentum strategy.  The downside of a momentum strategy is that it can take a while to work out the kinks and I don't use one though I do remember a columnist from MSN Money that did that kind of trading regularly."