Specifically, what does the Google Finance average volume indicate?
I hovered over the label for trading volume and the following message popped up: Volume / average volume  Volume is the number of shares traded on the   latest trading day. The average volume is measured over 30 days.
When you look at the charts in Google Finance, they put the news on the right hand side. The time stamp for each news item is indicated with a letter in the chart. This often shows what news the market is reacting to. In your example:  Clicking on the letter F leads to this Reuters story: http://www.reuters.com/article/2011/02/04/usa-housing-s-idUSWAT01486120110204 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. "Not to detract from the other answers at all (which are each excellent and useful in their own right), but here's my interpretation of the ideas: Equity is the answer to the question ""Where is the value of the company coming from?""  This might include owner stakes, shareholder stock investments, or outside investments.  In the current moment, it can also be defined as ""Equity = X + Current Income - Current Expenses"" (I'll come back to X). This fits into the standard accounting model of ""Assets - Liabilities = Value (Equity)"", where Assets includes not only bank accounts, but also warehouse inventory, raw materials, etc.; Liabilities are debts, loans, shortfalls in inventory, etc.  Both are abstract categories, whereas Income and Expense are hard dollar amounts.  At the end of the year when the books balance, they should all equal out. Equity up until this point has been an abstract concept, and it's not an account in the traditional (gnucash) sense.  However, it's common practice for businesses to close the books once a year, and to consolidate outstanding balances.  When this happens, Equity ceases to be abstract and becomes a hard value: ""How much is the company worth at this moment?"", which has a definite, numeric value. When the books are opened fresh for a new business year, the Current Income and Current Expense amounts are zeroed out.  In this situation, in order for the big equation to equal out: Assets - Liabilities = X + Income - Expeneses the previous net value of the company must be accounted for.  This is where X comes in, the starting (previous year's) equity.  This allows the Assets and Liabilities to be non-zero, while the (current) Income and Expenses are both still zeroed out.  The account which represents X in gnucash is called ""Equity"", and encompasses not only initial investments, but also the net increase & decreases from previous years.  While the name would more accurately be called ""Starting Equity"", the only problem caused by the naming convention is the confusion of the concept Equity (X + Income - Expenses) with the account X, named ""Equity""." It's got to be a bad chunk of data on Google.  Yahoo finance does not show that anomaly for 1988, nor does the chart from Home Depot's investor relations site: Yup. What I wanted to know was where they are pulling it up from. Have casually used Google finance for personal investments, but they suck at corp actions. Not sure if they provide free APIs, but that would probably suck too! :D This is from Google Finance right now. The only recommendation I have is to try the stock screener from Google Finance : https://www.google.com/finance?ei=oJz9VenXD8OxmAHR263YBg#stockscreener I get CapIQ and Bloomberg, and I definitely prefer Bloomberg just because of the completeness of information. There's nowhere else that you can get a full financial statement breakdown and then seconds later have a debt distribution schedule and then with another couple keystrokes get a complete credit ratings history and have that only be scratching the surface of the info available. CapIQ is sometimes better than Bloomberg for street consensus estimates going out more than a year or two but I don't find myself using it that much. What is the average daily volume traded? It looks like this stock may have a liquidity problem. If that is the case I would not buy this stock at all as you may have the same problem when you try to sell it. Generally try to stay away from illiquid stocks, if your order size is more than 10% of the average daily volume traded, then don't buy it.  I usually stay away from stocks with an average daily volume of less than 100,000. Alphabet has about 40% on shore or 60%.   I know it is 60/40 but forget which way.    So way, way more than they really need.  What Apple does is borrow against the offshore money when needed,   Apple now has over $90b in debt and Google less than $4b.   So Google would not have any problem. On closer look, it appears that Google Finance relies on the last released 10-k statement (filing date 10/30/2013), but outstanding shares as of last 10-Q statement. Using these forms, you get ($37,037M / 5.989B ) = $6.18 EPS. I think this is good to note, as you can manually calculate a more up to date EPS value than what the majority of investors out there are relying on. And the kind folk at Yahoo Finance came to the same conclusion.  Keep in mind, book value for a company is like looking at my book value, all assets and liabilities, which is certainly important, but it ignores my earnings.  BAC (Bank of America) has a book value of $20, but trades at $8. Some High Tech companies have negative book values, but are turning an ongoing profit, and trade for real money. It's been awhile since my last finance course, so school me here:  What is the market cap of a company actually supposed to represent? I get that it's the stock price X the # of shares, but what is that actually representing? Revenues? PV of all future revenues? PV of future cash flows?  In any case, good write up. Valuation of tech stocks is quite the gambit, and you've done a good job of dissecting it for a layman. 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? Part A solution:  Assume no turnover in A.:      Average Balance * Annual Interest - Average Balance * Annual Cost of funds + Annual Fee = Profit from A        Profit From A = Average Balance * Interest Rate - Cost of Funds * Average Balance + Annual Fee     So for B here is the sneaky thing, the Average Balance is 1/12 of the Volume... That makes it really simple...       Volume * InterChange - Average Balance * Cost of Funds + Annual Fee = Profit From A       Volume = 12 x Average Balance So:       12 x Average Balance * Interchange (0.015) - Average Balance * Cost of Funds (0.04) + Annual Fee (Say 50)= Profit From A (260)       0.18* Average Balance - 0.04 * Average Balance = 210  Average Balance = 210/.14  Annual turnover = 12* Average Balance   Come @ me bro :p