how does one see the CBOE VIX index on Google Finance?
For whatever reason, I don't believe they offer it.  Yahoo does.  A google for google finance VIX turns up people asking the question, but no quote on google. You can pull up the VIX index on Google Finance by entering INDEXCBOE:VIX
Try Google Finance Screener ; you will be able to filter for NASDAQ and NYSE exchanges. On Monday, the 27th of June 2011, the XIV ETF underwent a 10:1 share split. The Yahoo Finance data correctly shows the historic price data adjusted for this split.  The Google Finance data does not make the adjustment to the historical data, so it looks like the prices on Google Finance prior to 27 June 2011 are being quoted at 10 times what they should be.   Coincidentally, the underlying VIX index saw a sudden surge on the Friday (24 June) and continued on the Monday (27 June), the date that the split took effect.  This would have magnified the bearish moves seen in the historic price data on the XIV ETF. Here is a link to an article detailing the confusion this particular share split caused amongst investors.  It appears that Google Finance was not the only one to bugger it up.  Some brokers failed to adjust their data causing a lots of confusion amongst clients with XIV holdings at the time. This is a recurring problem on Google Finance, where the historic price data often (though not always) fails to account for share splits. In order to see whether you can buy or sell some given quantity of a stock at the current bid price, you need a counterparty (a buyer) who is willing to buy the number of stocks you are wishing to offload. To see whether such a counterparty exists, you can look at the stock's order book, or level two feed. The order book shows all the people who have placed buy or sell orders, the price they are willing to pay, and the quantity they demand at that price. Here is the order book from earlier this morning for the British pharmaceutical company, GlaxoSmithKline PLC.  Let's start by looking at the left-hand blue part of the book, beneath the yellow strip. This is called the Buy side. The book is sorted with the highest price at the top, because this is the best price that a seller can presently obtain. If several buyers bid at the same price, then the oldest entry on the book takes precedence. You can see we have five buyers each willing to pay 1543.0 p (that's 1543 British pence, or £15.43) per share. Therefore the current bid price for this instrument is 1543.0. The first buyer wants 175 shares, the next, 300, and so on. The total volume that is demanded at 1543.0p is 2435 shares. This information is summarized on the yellow strip: 5 buyers, total volume of 2435, at 1543.0. These are all buyers who want to buy right now and the exchange will make the trade happen immediately if you put in a sell order for 1543.0 p or less. If you want to sell 2435 shares or fewer, you are good to go. The important thing to note is that once you sell these bidders a total of 2435 shares, then their orders are fulfilled and they will be removed from the order book. At this point, the next bidder is promoted up the book; but his price is 1542.5, 0.5 p lower than before. Absent any further changes to the order book, the bid price will decrease to 1542.5 p. This makes sense because you are selling a lot of shares so you'd expect the market price to be depressed. This information will be disseminated to the level one feed and the level one graph of the stock price will be updated. Thus if you have more than 2435 shares to sell, you cannot expect to execute your order at the bid price in one go. Of course, the more shares you are trying to get rid of, the further down the buy side you will have to go. In reality for a highly liquid stock as this, the order book receives many amendments per second and it is unlikely that your trade would make much difference. On the right hand side of the display you can see the recent trades: these are the times the trades were done (or notified to the exchange), the price of the trade, the volume and the trade type (AT means automatic trade).  GlaxoSmithKline is a highly liquid stock with many willing buyers and sellers. But some stocks are less liquid. In order to enable traders to find a counterparty at short notice, exchanges often require less liquid stocks to have market makers. A market maker places buy and sell orders simultaneously, with a spread between the two prices so that they can profit from each transaction. For instance Diurnal Group PLC has had no trades today and no quotes. It has a more complicated order book, enabling both ordinary buyers and sellers to list if they wish, but market makers are separated out at the top. Here you can see that three market makers are providing liquidity on this stock, Peel Hunt (PEEL), Numis (NUMS) and Winterflood (WINS). They have a very unpalatable spread of over 5% between their bid and offer prices. Further in each case the sum total that they are willing to trade is 3000 shares. If you have more than three thousand Dirunal Group shares to sell, you would have to wait for the market makers to come back with a new quote after you'd sold the first 3000. "There is no good proxy for VIX, because it is a completely made-up value. Most listed options trade on an underlying security.  I can therefore choose to buy either the stock, or a future or option on that stock.  In this way, the future and option are derivatives in that they derive their value (in part) based on something else, in this case the stock price as of now. VIX is a different entity altogether.  It is based on the volatility of the market, using ""market expectation of near term volatility conveyed by stock index option prices"".  But the FAQ goes on to state that they are adding factors into the formula. So right away there is no one equity/stock that you can hold that will necessarily match the VIX in any significant way, because it is not directly based on stocks, but indirectly through other options and computations. In effect, therefore, the VIX in indeed only available through its options, and is not observable (tradable) in and of itself." The biggest issue with Yahoo Finance is the recent change to the API in May. The data is good quality, includes both dividend/split adjusted and raw prices, but it's much more difficult to pull the data with packages like R quantmod than before.  Google is fine as well, but there are some missing data points and you can't unadjust the prices (or is it that they're all unadjusted and you can't get adjusted? I can't recall). I use Google at home, when I can't pull from Bloomberg directly and when I'm not too concerned with accuracy.  Quandl seems quite good but I haven't tried them. There's also a newer website called www.alphavantage.co, I haven't tried them yet either but their data seems to be pretty good quality from what I've heard. Yes, Alpha Vantage. As MasticatedTesticle points out, it is worth asking where it originally comes from, but it looked to me like a solid source for, in particular, intraday trading data. Additionally, Yahoo finance is done on R (zoo, PerformanceAnalytics libraries don't work anymore as far as I can tell). The numbers look right to me tho, let me know if things are off. You bought 1 share of Google at $67.05 while it has a current trading price of $1204.11. Now, if you bought a widget for under $70 and it currently sells for over $1200 that is quite the increase, no? Be careful of what prices you enter into a portfolio tool as some people may be able to use options to have a strike price different than the current trading price by a sizable difference. Take the gain of $1122.06 on an initial cost of $82.05 for seeing where the 1367% is coming. User error on the portfolio will lead to misleading statistics I think as you meant to put in something else, right? Finviz can be screened by beta which is an index of correlation. Finviz covers all major North American exchanges and some others. http://www.euroinvestor.com/exchanges/nasdaq/macromedia-inc/41408/history will work as DumbCoder states, but didn't contain LEHMQ (Lehman Brother's holding company). You can use Yahoo for companies that have declared bankruptcy, such as Lehman Brothers: http://finance.yahoo.com/q/hp?s=LEHMQ&a=08&b=01&c=2008&d=08&e=30&f=2008&g=d but you have to know the symbol of the holding company. The CBOE site, as well as some other sites and trading platforms, will show the bid/ask and statistics for that option at each individual options exchange, in addition to statistics and the best bid/offer across all exchanges. cboe.com: Delayed Quote Help lists what the single-letter codes mean. A is for the AMEX options exchange, B is for BOX, X is for PHLX, etc. There are multiple ETFs which inversely track the common indices, though many of these are leveraged.  For example, SDS tracks approximately -200% of the S&P 500.  (Note: due to how these are structured, they are only suitable for very short term investments) You can also consider using Put options for the various indices as well.  For example, you could buy a Put for the SPY out a year or so to give you some fairly cheap insurance (assuming it's a small part of your portfolio). One other option is to invest against the market volatility.  As the market makes sudden swings, the volatility goes up; this tends to be true more when it falls than when it rises.  One way of invesing in market volatility is to trade options against the VIX. Has the VIX always received this much attention? I feel like I never really saw articles on it until about 2 years ago, and the attention has especially ramped up post election. Granted, I'm young and may have just not been aware.  As the post alludes to, I think a big problem is people's interpretation of VIX being the market expectation of volatility. In a mathematical sense, that would only be valid if 1) the price of options perfectly reflects volatility, and 2) investors can rationally evaluate the future.   (1) is arguable as volatility is just the single free parameter in BS and captures all confounded factors in the price, including supply/demand mismatches. (2) is debatable just because it essentially assumes that the wisdom of crowds will be true on average. My prior on this is that they're correct that often, and that the VIX is probably a pretty poor predictor of future realized volatility. I'll check this last claim and edit. The official source for the Dow Jones P/E is Dow Jones.  Unfortunately, the P/E is behind a pay-wall and not included in the free registration. The easiest (but only approximate) solution is to track against an equivalent ETF.  Here's  a list of popular indexes with an equivalent ETF. Source The only recommendation I have is to try the stock screener from Google Finance : https://www.google.com/finance?ei=oJz9VenXD8OxmAHR263YBg#stockscreener "P/E is Price divided by Earnings Per Share (EPS). P/E TTM is Price divided by the actual EPS earned over the previous 12 months - hence ""Trailing Twelve Month"". In Forward P/E is the ""E"" is the average of analyst expectations for the next year in EPS. Now, as to what's being displayed. Yahoo shows EPS to be 1.34. 493.90/1.34 = P/E of 368.58 Google shows EPS to be 0.85. 493.40/0.85 = P/E of 580.47 (Prices as displayed, respectively) So, by the info that they are themselves displaying, it's Google, not Yahoo, that's displaying the wrong P/E. Note that the P/E it is showing is 5.80 -- a decimal misplacement from 580 Note that CNBC shows the Earnings as 0.85 as well, and correctly show the P/E as 580 http://data.cnbc.com/quotes/BP.L A quick use of a currency calculator reveals a possible reason why EPS is listed differently at yahoo. 0.85 pounds is 1.3318 dollars, currently. So, I think the Yahoo EPS listing is in dollars. A look at the last 4 quarters on CNBC makes that seem reasonable: http://data.cnbc.com/quotes/BP.L/tab/5 those add up to $1.40."