How are shares used, and what are they, physically?
Shares used to be paper documents, but these days they are more commonly held electronically instead, although this partly depends on what country you're in. But it doesn't make any significant practical difference. Regardless of their physical form, a share simply signifies that you own a certain proportion of a company, and are thus entitled to receive any dividends that may be paid to the shareholders. To sell your shares, you need a broker -- there are scores of online ones who will sell them for a modest fee. Your tax forms are entirely dependent on the jurisdiction(s) that tax you, and since you've not told us where you are, no one can answer that. For some very small private companies I know of (and am part of), paper stocks do exist. You can sit at the table with the damn things in your hand and wave them in people's faces.  They tell everyone how much of the company you own as a result of the money you ponied up. On the other hand, most stocks are now electronic. Nothing to hold. Just electronic records to review. They still represent how much you own of the company because of some amount of money you have put at risk, but they aren't anywhere near as much fun as the old-fasioned paper proofs. (As MrChrister notes, you can pay a small fee to get paper if you like, even for some big companies. Some of these paper stocks are remarkably elaborate and fine looking, but hardly necessary.) (You can see more info about what stocks are and what sort of stocks exist here: http://www.wikinvest.com/wiki/What_is_a_stock%3F) If you are particularly interested in the share certificate artifacts themselves, there is a collection hobby in paper share certificates and bonds, called scripophily.  This can include both active share certificates (for instance, think about giving your kid or grandkid a frameable paper share of Hasbro, Disney or McDonalds?), inactive certificates from famous bankruptcies or famous companies of the past, or just the visual interest in scrollwork and engraved vignettes. How to 'use' your shares: If you own common shares in a company (as opposed to a fund) then you have the right (but not the obligation) to excersize one vote per share on questions put before the shareholders. Usually, this occurs once a year. Usually these questions regard approval of auditors. Sometimes they involve officers such as directors on the board. You will be mailed a form to fill out and mail back in.  Preferred shares usually are not voting shares,but common shares always are.  By the way, I do not recommend owning shares in companies. I recommend funds instead,either ETFs or mutual funds. Owning shares in companies puts you at risk of a failure of that company. Owning funds spreads that risk around,thus reducing your exposure.  There are, really, two purposes for owning shares 1) Owning shares gives you the right to declared dividends 2) Owning shares allows you to sell those shares at some time in the future. (Hopefully at a profit)  One obscure thing you can do with owned shares is to 'write' (sell) covered put options. But options are not something that you need to concern yourself with at this point.  You may find it useful to sign up for a free daily email from www.investorwords.com.
"When there is a trade the shares were both bought and sold. In any trade on the secondary market there has to be both a buyer and a seller for the trade to take place. So in ""lasttradesize"" a buyer has bought the shares from a seller." "This answer will expand a bit on the theory. :) A company, as an entity, represents a pile of value. Some of that is business value (the revenue stream from their products) and some of that is assets (real estate, manufacturing equipment, a patent portfolio, etc). One of those assets is cash. If you own a share in the company, you own a share of all those assets, including the cash. In a theoretical sense, it doesn't really matter whether the company holds the cash instead of you. If the company adds an extra $1 billion to its assets, then people who buy and sell the company will think ""hey, there's an extra $1 billion of cash in that company; I should be willing to pay $1 billion / shares outstanding more per share to own it than I would otherwise."" Granted, you may ultimately want to turn your ownership into cash, but you can do that by selling your shares to someone else. From a practical standpoint, though, the company doesn't benefit from holding that cash for a long time. Cash doesn't do much except sit in bank accounts and earn pathetically small amounts of interest, and if you wanted pathetic amounts of interests from your cash you wouldn't be owning shares in a company, you'd have it in a bank account yourself. Really, the company should do something with their cash. Usually that means investing it in their own business, to grow and expand that business, or to enhance profitability. Sometimes they may also purchase other companies, if they think they can turn a profit from the purchase. Sometimes there aren't a lot of good options for what to do with that money. In that case, the company should say, ""I can't effectively use this money in a way which will grow my business. You should go and invest it yourself, in whatever sort of business you think makes sense."" That's when they pay a dividend. You'll see that a lot of the really big global companies are the ones paying dividends - places like Coca-Cola or Exxon-Mobil or what-have-you. They just can't put all their cash to good use, even after their growth plans. Many people who get dividends will invest them in the stock market again - possibly purchasing shares of the same company from someone else, or possibly purchasing shares of another company. It doesn't usually make a lot of sense for the company to invest in the stock market themselves, though. Investment expertise isn't really something most companies are known for, and because a company has multiple owners they may have differing investment needs and risk tolerance. For instance, if I had a bunch of money from the stock market I'd put it in some sort of growth stock because I'm twenty-something with a lot of savings and years to go before retirement. If I were close to retirement, though, I would want it in a more stable stock, or even in bonds. If I were retired I might even spend it directly. So the company should let all its owners choose, unless they have a good business reason not to. Sometimes companies will do share buy-backs instead of dividends, which pays money to people selling the company stock. The remaining owners benefit by reducing the number of shares outstanding, so they own more of what's left. They should only do this if they think the stock is at a fair price, or below a fair price, for the company: otherwise the remaining owners are essentially giving away cash. (This actually happens distressingly often.) On the other hand, if the company's stock is depressed but it subsequently does better than the rest of the market, then it is a very good investment. The one nice thing about share buy-backs in general is that they don't have any immediate tax implications for the company's owners: they simply own a stock which is now more valuable, and can sell it (and pay taxes on that sale) whenever they choose." It doesn't matter which exchange a share was purchased through (or if it was even purchased on an exchange at all--physical share certificates can be bought and sold outside of any exchange). A share is a share, and any share available for purchase in New York is available to be purchased in London. Buying all of a company's stock is not something that can generally be done through the stock market. The practical way to accomplish buying a company out is to purchase a controlling interest, or enough shares to have enough votes to bind the board to a specific course of action. Then vote to sell all outstanding shares to another company at a particular fixed price per share. Market capitalization is an inaccurate measure of the size of a company in the first place, but if you want to quantify it, you can take the number of outstanding shares (anywhere and everywhere) and multiply them by the price on any of the exchanges that sell it. That will give you the market capitalization in the currency that is used by whatever exchange you chose. Sure they can (most publicly traded banks at least) - and they do it a lot. Many banks have a proprietary trading desk, or Prop desk, where traders are buying and selling shares of publicly traded companies on behalf of the bank, with the bank's own money. This is as opposed to regular trading desks where the banks trade on behalf of their customers. "Random question: are there any companies with ""physical,"" ""real,"" or ""in-kind"" dividends?   For clarification, suppose a winery offers a security with a dividend of X bottles of wine deliverable annually for every Y amount of shares owned.   Does such a company or practice exist?" the biggest issue with a pure physical dividend is the cost of transfer. Cash or stock dividends are decentralized **and** easy to transfer ownership, hence the majority of value can be transferred to the shareholder.   If you were to deliver wine to every shareholder, you would have to deduct the cost of transport from the value of the wine dividend, otherwise it becomes value-reductive to shareholders and they'd be better off keeping the dividend as stock value. Well, if one share cost $100 and the company needs to raise $10000, then the company will issue 100 shares for that price.  Right? However, say there's 100 shares out there now, then each share holder owns 1/100th of the company. Now the company will remain the same, but it's shared between 200 shareholders after the issuing of new shares.  That means each share holder now owns 1/200th of the company.  And hence only gets 1/200th of their earnings etc. When you own a share, you also own a vote (in most cases). That vote is your means of controlling the assets and management of the company. If you had enough votes and wanted to trade a share for an iPhone or liquidate the company entirely, you could do it. The only thing that prevents you from doing that is that companies are not set up to handle the transaction that way. Stock holders are usually trying to buy investments, not iPhones. There are companies that have more cash in the bank than the market cap (total value) of their stock. They usually don't remain as public companies for long in that case. An investor or group of investors buy them up and split the cash. If you had enough shares of Apple, you could do that to; or, just trade one for an iPhone. "Getting ""physical stocks"" will in most cases only be for the ""fun of it"". Most stocks nowadays are registered electronically and thus the physical stock will be of no value - it will just be a certificate saying that you own X amount of shares in company X; but this information is at the same time registered electronically. Stocks are not like bearer bonds, the certificate itself contains no value and is registered to each individual/entity. Because the paper itself is worthless, stealing it will not affect your amount of stock with the company.  This is true for most stocks - there may exist companies who live in the 70s and do not keep track of their stock electronically, but I suspect it will only be very few (and most likely very small and illiquid companies)." I don't know why stocks in some industries tend to have lower prices per share than others. It doesn't really matter much. Whether a company has 1,000,0000 shares selling for $100 each, or 10,000,000 shares selling for $10 each, either way the total value is the same. Companies generally like to keep the share price relatively low so that if someone wants to buy a small amount, they can. Like if the price was $10,000 per share, than an investor with less than $10,000 to put in that one stock would be priced out of the market. If it's $10, then if someone wants $10 they can buy one share, and if someone wants $10,000 they can buy 1000 shares. As to why energy stocks are volatile, I can think of several reasons. One, in our current world, energy is highly susceptible to politics. A lot of the world's energy comes from the Middle East, which is a notoriously unstable region. Any time there's conflict there, energy supplies from the region become uncertain. Oil-producing countries may embargo countries that they don't like. A war will, at the very least, interfere with transportation and shipping, and may result in oil wells being destroyed. Etc. Two, energy is consumed when you use it, and most consumers have very limited ability to stockpile. So you're constantly buying the energy you need as you need it. So if demand goes down, it is reflected immediately. Compare this to, say, clothing. Most people expect to keep the same clothes for years, wearing them repeatedly. (Hopefully washing them now and then!) So if for some reason you decided today that you only need three red shirts instead of four, this might not have any immediate impact on your buying. It could be months before you would have bought a new red shirt anyway. There is a tendency for the market to react rather slowly to changes in demand for shirts. But with energy, if you decide you only need to burn 3 gallons of gas per week instead of 4, your consumption goes down immediately, within days. Three, really adding to number two, energy is highly perishable, especially some forms of energy. If a solar power station is capable of producing 10 megawatts but today there is only demand for 9 megawatts, you can't save the unused megawatt for some future time when demand is higher. It's gone. (You can charge a battery with it, but that's pretty limited.) You can pile up coal or store natural gas in a tank until you need it, but you can't save the output of a power plant. Note numbers two and three also apply to food, which is why food production is also very volatile. "Thanks for your reply. I think a lot of people are confused when talking about ownership, and I think it is a definitional issue.   When a company issues stock (the first time or anytime), what they are doing is ""selling"" the right to a percentage of the dividend. They are not actually selling parts of the company to you. Everyone thinks this way though, and that has to do with the Chicago School economists who perpetuated their ideas of ownership which is what everyone know thinks is the case. This way of thinking about corporations and ownership is just wrong (not ethically), just erroneous.   As I stated before, Lynn Stout of Cornell University explains this really well. I would encourage anyone to read more about it." "What you are describing is a very specific case of the more general principle of how dividend payments work. Broadly speaking, if you own common shares in a corporation, you are a part owner of that corporation; you have the right to a % of all of that corporation's assets. The value in having that right is ultimately because the corporation will pay you dividends while it operates, and perhaps a final dividend when it liquidates at the end of its life. This is why your shares have value - because they give you ownership of the business itself. Now, assume you own 1k shares in a company with 100M shares, worth a total of $5B. You own 0.001% of the company, and each of your shares is worth $50; the total value of all your shares is $50k. Assume further that the value of the company includes $1B in cash. If the company pays out a dividend of $1B, it will now be only worth $4B. Your shares have just gone down in value by 20%! But, you have a right to 0.001% of the dividend, which equals a $10k cash payment to you. Your personal holdings are now $40k worth of shares, plus $10k in cash. Except for taxes, financial theory states that whether a corporation pays a dividend or not should not impact the value to the individual shareholder.  The difference between a regular corporation and a mutual fund, is that the mutual fund is actually a pool of various investments, and it reports a breakdown of that pool to you in a different way. If you own shares directly in a corporation, the dividends you receive are called 'dividends', even if you bought them 1 minute before the ex-dividend date. But a payment from a mutual fund can be divided between, for example, a flow through of dividends, interest, or a return of capital. If you 'looked inside' your mutual fund you when you bought it, you would see that 40% of its value comes from stock A, 20% comes from stock B, etc etc., including maybe 1% of the value coming from a pile of cash the fund owns at the time you bought your units.  In theory the mutual fund could set aside the cash it holds for current owners only, but then it would need to track everyone's cash-ownership on an individual basis, and there would be thousands of different 'unit classes' based on timing. For simplicity, the mutual fund just says ""yes, when you bought $50k in units, we were 1/3 of the year towards paying out a $10k dividend. So of that $10k dividend, $3,333k of it is assumed to have been cash at the time you bought your shares. Instead of being an actual 'dividend', it is simply a return of capital.""  By doing this, the mutual fund is able to pay you your owed dividend [otherwise you would still have the same number of units but no cash, meaning you would lose overall value], without forcing you to be taxed on that payment. If the mutual fund didn't do this separate reporting, you would have paid $50k to buy $46,667k of shares and $3,333k of cash, and then you would have paid tax on that cash when it was returned to you. Note that this does not ""falsely exaggerate the investment return"", because a return of capital is not earnings; that's why it is reported separately.  Note that a 'close-ended fund' is not a mutual fund, it is actually a single corporation. You own units in a mutual fund, giving you the rights to a proportion of all the fund's various investments. You own shares in a close-ended fund, just as you would own shares in any other corporation. The mutual fund passes along the interest, dividends, etc. from its investments on to you; the close-ended fund may pay dividends directly to its shareholders, based on its own internal dividend policy." You or the broker place an order to buy the share with the stock exchange. There has to be a matching sell order by someone.  Once a match is made, you pay the money and get the share. In most mutual funds you delegate voting rights to the investment manager.  The securities are typically held by a third party bank as part of the requirements for Securities Investor Protection Corporation (SIPC).  You own equity in that mutual fund, which owns the shares (but are held by a third party); you don't have direct ownership as in most cases that would result in you owning fractions of shares. When you buy a stock, you become a partial owner of the company that the stock is for. As the company is valued at a higher or lower amount, the stock will reflect that by gaining or losing value. You still own that stock. For example, if you bought a stock for $10 per share and next week it is worth $8 dollars per share, the only loss incurred is on paper. You do not have to pay the difference (which I think is what you are asking?) and will only physically lose that money if you sell at that point. Similarly if that stock becomes worth $12, you have only gained money on paper and can only physically see it if you sell at that point.