Why companies appear in several stock exchanges?
"If I buy the one from NSY, is it the ""real"" Sinopec? No - you are buying an American Depository Receipt. Essentially some American bank or other entity holds a bunch of Sinopec stock and issues certificates to the American exchange that American investors can trade.  This insulates the American investors from the cost of international transactions.   The price of these ADRs should mimic the price of the underlying stock (including changes the currency exchange rate) otherwise an arbitrage opportunity would exist.  Other than that, the main difference between holding the ADR and the actual stock is that ADRs do not have voting rights. So if that is not important to you then for all intents and purposes trading the ADR would be the same as trading the underlying stock." "The case you are looking at is rather special, because the Chinese government for the longest time did not allow foreigners to invest in Chinese stocks. The ADRs explained in @DStanley's answer are a way around that restriction; recently there are some limited official ways,  In general, it is perfectly normal for a stock to appear on different exchanges, in different currencies, and it's all the ""real"" stock. Because remember: a stock exchange is really nothing more than a fancy place for people to buy and sell stocks. There is absolutely no reason why a specific stock should only be traded in one place. Companies that have decided to be publically tradeable generally want to be traded in as many exchanges as possible, because it makes the stock more liquid, which helps their shareholders. Individual exchanges have different requirements for a stock to be listed for trading there, some may even do it without the company's explicit approval."
according to me it's the news about a particular stock which makes people to buy or sell it mostly thus creates a fluctuation in price . It also dependents on the major stock holder. Say a stock is listed in Nasdaq, and the same company has a stock listed in Tsx. Does the Nasdaq price affect the Tsx price as trading commences? Not directly. Basically, an exchange is a market, and the price is defined only by supply and demand in that market. However, any substantial price differential for a commodity traded in multiple market creates an arbitrage opportunity, and there are many traders whose job it is exactly to find and use such opportunities. Their activity in turn has the effect of reducing the price differentials to the point where transaction costs make them unprofitable. With high-frequency traders around, the time for a price differential to disappear is nowadays measured in milliseconds. If a trader buys from one exchange, will it affect the price of the other? Only through the mechanism mentioned above.  Are there any benefits to being listed in two exchanges? It increases the liquidity of a stock. "(Note: out of my depth here, but in case this helps...) While not a direct answer to your question, I'll point out that in the inverse situation - a U.S. investor who wants to buy individual stocks of companies headquartered outside US - you would buy ADRs, which are $-denominated ""wrapper"" stocks.  They can be listed with one or multiple brokerages. One alternative I'd offer the person in my example would be, ""Are you really sure you want to directly buy individual stocks?""  One less targeted approach available in the US is to buy ETFs targeted for a given country (or region).   Maybe there's something similar there in Asia that would eliminate the (somewhat) higher fees associated with trading foreign stocks." The stock exchange here serves as a meeting place for current shareholders who want to sell their shares to someone else. This has nothing to do with liquidation, which is a transaction between the company and its shareholders. A company does not have to be listed on an exchange to make distributions to shareholders. Classes of shares are not necessarily standardized. Some share classes have preference above others in the event of a liquidation. Some share classes represent a different proportion of ownership interest. Any time you see multiple share classes, you need to research what is different for that specific corporation. "VIV.PA - is Vivendi listed on a stock exchange in Paris VIVEF - is Vivendi listed on the OTC Other Exchange. VIVHY - is Listed on the OTC:Pink Sheets.  A company can be listed on multiple exchanges, they are known as a dual-listed company. It's a corporate structure in which two corporations function as a single operating business through a legal equalization agreement, but retain separate legal identities and stock exchange listings. Pretty much all DLCs are cross-border, and have tax advantages for the corporations and their stockholders. When a DLC is created, in essence two companies are created and have two separate bodies of shareholders, but they agree to share all the risks and rewards of the ownership of all their operating businesses in a fixed proportion, laid out in a contract called an ""equalization agreement"". The shares of a DLC parents have claim to the exact same underlying cash flows. So in theory the stock prices of these companies should move exactly the same. However in practice there can be differences between these prices. More info on OTC exchanges can be found here - keep in mind this info is from the company that runs these listings. Over the counter stocks are held to a FAR lesser regulation standard. I would recommend doing further interdependent research before pursuing any action." At the present time, businesses are facing serious threat from various sources. This is needless to say that, if there is a new brand wants to occupy a small space in market, it has to make an elusive effort while there are different brands have already taken their places. There are many reasons but perhaps the most telling is that these small foreign companies usually have not experienced diminishing marginal returns. This means they grow faster, which means higher returns for investment. However a lack of infrastructure, and of political and economic stability, make these investments risky! Initially, Each company has 10k shares. Company B has $500k money and possibly other assets. Every company has stated purpose. It can't randomly buy shares in some other firm.   Company A issued 5k new shares, which gives it $500k money. Listed companies can't make private placements without regulatory approvals. They have to put this in open market via Public issue or rights issue. Company B does the same thing, issuing 5k shares for $500k money. Company A bought those 5k shares using the $500k it just got There is no logical reason for shareholder of Company B to raise 5K from Company A for the said consideration. This would have to increase. They are providing you a service and they charge you for it. The service includes giving you a trading platform(website and the infrastructure), doing all the background work for setting up services for you, relaying your orders to the market or as a broker fulfilling your orders, doing settlement when an order is matched, giving you access to the stock market(the costs are quite high to get a license to relay orders to the market and I believe it needs to be renewed every year). There are transaction fees which the stock exchanges charge the brokers to use the stock markets infrastructure and connect to it. And then interfacing with banks for monetary transactions and also doing according to the law in the jurisdiction they are located in. Most of it is an one time cost, but they are a private enterprise out to make profit so they will charge for their services. "Why are there so many stock exchanges in the world?  The simple answer is that there is a lot of money to be made by charging fees to facilitate the trading of securities, but there are other factors at play here relating to new technologies. Trading volumes have increased rapidly in recent years.  According to this ITG data, in 1997, 6.5 billion shares were traded on US exchanges.  By 2015 this number had increased to 40.8 billion shares.  There are a number of reasons for this rapid increase in volumes.  Most significant would be the introduction of new technologies that allow for high volume, high frequency trading. This increase in activity has be accompanied by an increase in the number of stock exchanges.  As CQM points out in his answer, there has been considerable consolidation in the ownership of ""legacy"" exchanges.  For example, the NYSE merged with EuroNext in 2007, and the combined group is now owned by the Intercontinental Exchange, which also owns numerous smaller stock exchanges as well as a number of derivative/commodities exchanges. However, this consolidation in ownership has been more than matched by the creation of many ""virtual"" exchanges.   In North America these virtual exchanges are called ""Alternative Trading Systems"".  In Europe, they are called ""Multilateral Trading Facilities"".   These new virtual exchanges, sometimes referred to as ""dark pools"", have begun to significantly eat away at the volumes of the legacy exchanges.  If you look at the ITG data (linked above), you will see that the total volume of shares traded on legacy exchanges actually peaked in 2008, and has since then has decreased.  This coincides roughly with the appearance of the virtual exchanges and the new high frequency trading methods.  According to this paper from the SEC site, dated 2013, Alternative Trading Systems accounted for 11.3% of total volumes in 2012.  This will have increased rapidly in the years since 2012.  It is this loss of business that has prompted the consolidation in the ownership of the legacy exchanges. These new exchange are ""conceptually the same"" as the legacy exchanges and must play by the same regulatory rules." There are a few reason why share prices increase or decrease, the foremost is expectation of the investors that the company/economy will do well/not well, that is expectation of profit/intrinsic value growth over some time frame (1-4 qtrs.)there is also demand & supply mismatch over (usually) short time. If you really see, the actual 'value' of a company is it's net-worth (cash+asset+stock in trade+brand value+other intangibles+other incomes)/no of shares outstanding, which (in a way) is the book value, then all shares should trade at their book value, the actual number but it does not, the expectation of investors that a share would be purchased by another investor at a higher price because the outlook of the company over a long time is good. Because of methods like the [Double Irish Arrangement](http://en.m.wikipedia.org/wiki/Double_Irish_Arrangement), which is used by the likes of Apple, Google, and many others.  It makes headlines for a myrad of reasons depending on the publication and the market. Bloomberg/wsj/etc will publish it because having low tax overhead is good for business and good for shareholders. The politics and possibility of regulatory change are also pertinent and may influence markets.  Other publications may publish for different reasons. There is a growing backlash against such forms of tax evasion. The more complicated the tax evasion, the less likely smaller firms may have access to those methods. It doesnt look good or feel right when medium fries are stuck paying our high corporate tax while the biggest fish swim free. I do believe it comes down to listing requirements.  That is getting very close to penny stock territory and typical delisting criteria.  I found this answer on Ivestopedia that speaks directly the question of stock price. Another thought is that if everyone were to do it, the rules would change.   The exchanges want to promote price appreciation.  Otherwise, everything trades in a tight band and there is little point to the whole endeavor.  Volatility is another issue that they are concerned about.  At such low stock prices, small changes in stock prices are huge percentage changes.  (As stated in that Ivestopedia answer, $0.10 swing in the price of a $1 stock is a 10% change.) Also, many fraudsters work in the area of penny stocks.  No company wants to be associated with that. The stock market is just like any other market, but stocks are bought and sold here. Just like you buy and sell your electronics at the electronics market, this is a place where buyers and sellers come together to buy and sell shares or stocks or equity, no matter what you call it. What are these shares?  A share is nothing but a portion of ownership of a company. Suppose a company has 100 shares issued to it, and you were sold 10 out of those, it literally means you are a 10% owner of the company. Why do companies sell shares? Companies sell shares to grow or expand. Suppose a business is manufacturing or producing and selling goods or services that are high in demand, the owners would want to take advantage of it and increase the production of his goods or services. And in order to increase production he would need money to buy land or equipment or labor, etc. Now either he could go get a loan by pledging something, or he could partner with someone who could give him money in exchange for some portion of the ownership of the company. This way, the owner gets the money to expand his business and make more profit, and the lender gets a portion of profit every time the company makes some. Now if the owner decides to sell shares rather than getting a loan, that's when the stock market comes into the picture. Why would a person want to trade stocks? First of all, please remember that stocks were never meant to be traded. You always invest in stocks. What's the difference? Trading is short term and investing is long term, in very simple language. It's the greed of humans which led to this concept of trading stocks. A person should only buy stocks if he believes in the business the company is doing and sees the potential of growth. Back to the question: a person would want to buy stocks of the company because: How does a stock market help society? Look around you for the answer to this question. Let me give you a start and I wish everyone reading this post to add at least one point to the answer. Corporations in general allow many people come together and invest in a business without fear that their investment will cause them undue liability - because shareholders are ultimately not liable for the actions of a corporation. The cornerstone North American case of how corporations add value is by allowing many investors to have put money towards the railroads that were built across America and Canada. For The stock market in particular, by making it easier to trade shares of a company once the company sells them, the number of people able to conveniently invest grows exponentially. This means that someone can buy shares in a company without needing to knock door to door in 5 years trying to find someone to sell to. Participating in the stock market creates 'liquidity', which is essentially the ease with which stocks are converted into cash. High liquidity reduces risk overall, and it means that those who want risk [because high risk often creates high reward] can buy shares, and those who want low risk [because say they are retiring and don't have a risk appetite anymore] can sell shares.