I am Brasilian resident, how to buy shares on NYSE?
I am not sure what a Brazilian equivalent is but you could just do an  ADR. Keep in mind that when you are investing in a foreign company there are certain currency risks that you may need to consider. There are some brokers in the US who would be happy to open an account for non-US residents, allowing you to trade stocks at NYSE and other US Exchanges. Some of them, along with some facts: DriveWealth Has support in Portuguese Website TD Ameritrade Has support in Portuguese Website Interactive Brokers Account opening is not that straightforward Website There are ETFs listed on the Brazilian stock market. Specifically there is one for S&P500 - SPXI11, which might fulfill your requirements, though as one commenter has observed, it doesn't answer your original question.
1)  You ignore dividends. You can hold your 10 million shares and never sell them and still get cash to live on if the security pays dividends. McDonalds stock pays 3% in dividends (a year). If you owned 10 million shares of McDonalds you would get 75,000 every three months. I am sure you could live on 25,000 a month.  2)  Enron was an energy company. They sold energy and made a profit (or rather were supposed to). Enron didn't make their money by selling stock. McDonalds makes their money by selling hamburgers (and other food). The income of a company comes from their customers, not from selling stock.  3)  IF you sold all of your 10 million shares within a short time frame it, likely, would drive the price of the stock down. But you do not need a billion dollars to live on. If you sold 1000 shares each month you would have plenty for buying cars and pizza. Selling 1000 shares may drive the price of the stock down for a minute or two. But the rest of the transactions, for that security made the same day, would quickly obscure the effect you had on the stock.  4)  When you buy stock your money does not (usualy) go to the company. If I were to buy 100 shares of McDonalds, McDonalds would not get $11670.That money is (usually) paid to a 'Market Maker' who, in turn, will use the cash to buy MCD from other individual shareholders (presumably for less than 116.70 a share). Any retail equity brokerage will give you access to the NYSE, and thus Facebook shares as they become available.  However, it is important to note that you nor any retail investor will be able to purchase FB at the IPO prices ($33-38 IIRC).  The only people who will be able to buy in at that price are the underwriting investment banks and major investors who have subscribed to the IPO.  You, and all the other retail investors will only be able to buy in as those major investors offer shares on the secondary market.   This being Facebook, there will probably be a significant premium over the IPO price, both due to demand and systemic underpricing of IPOs to encourage the opening 'pop'.   So, if you're intent on buying in at the IPO, pay close attention as the date approaches.  Look at how the recent big IPOs have performed (GRPN, LNKD come to mind).  Know how much you're willing to commit and what price you want.  However, no one is going to know what the opening market price will be come Friday morning.  Be watching your financial data source / analysis of choice and be prepared to make a judgement. "I may be underestimating your knowledge of how exchanges work; if so, I apologize.  If not, then I believe the answer is relatively straightforward. Lets say price of a stock at time t1 is 15$ .  There are many types of price that an exchange reports to the public (as discussed below); let's say that you're referring to the most recent trade price.  That is, the last time a trade executed between a willing buyer and a willing seller was at $15.00. Lets say a significant buy order of 1M shares came in to the market. Here I believe might be a misunderstanding on your part.  I think you're assuming that the buy order must necessarily be requesting a price of $15.00 because that was the last published price at time t1.  In fact, orders can request any price they want.  It's totally okay for someone to request to buy at $10.00.  Presumably nobody will want to sell to him, but it's still a perfectly valid buy order. But let's continue under the assumptions that at t1: This makes the bid $14.99 and the ask $15.00.  (NYSE also publishes these prices.) There aren't enough people selling that stock. It's quite rare (in major US equities) for anyone to place a buy order that exceeds the total available shares listed for sale at all prices.  What I think you mean is that 1M is larger than the amount of currently-listed sell requests at the ask of $15.00. So say of the 1M only 100,000 had a matching sell order and others are waiting. So this means that there were exactly 100,000 shares waiting to be sold at the ask of $15.00, and that all other sellers currently in the market told NYSE they were only willing to sell for a price of $15.01 or higher.  If there had been more shares available at $15.00, then NYSE would have matched them. This would be a trigger to the automated system to start increasing the price. Here is another point of misunderstanding, I think.  NYSE's automated system does not invent a new, higher price to publish at this point.  Instead it simply reports the last trade price (still $15.00), and now that all of the willing sellers at $15.00 have been matched, NYSE also publishes the new ask price of $15.01.  It's not that NYSE has decided $15.01 is the new price for the stock; it's that $15.01 is now the lowest price at which anyone (known to NYSE) is willing to sell.  If nobody happened to be interested in selling at $15.01 at t1, but there were people interested in selling at $15.02, then the new published ask would be $15.02 instead of $15.01 -- not because NYSE decided it, but just because those happened to be the facts at the time. Similarly, the new bid is most likely now $15.00, assuming the person who placed the order for 1M shares did not cancel the remaining unmatched 900,000 shares of his/her order.  That is, $15.00 is now the highest price at which anyone (known to NYSE) is willing to buy. How much time does the automated system wait to increment the price, the frequency of the price change and by what percentage to increment etc. So I think the answer to all these questions is that the automated system does none of these things.  It merely publishes information about (a) the last trade price, (b) the price that is currently the lowest price at which anyone has expressed a willingness to sell, and (c) the price that is currently the highest price at which anyone has expressed a willingness to buy. ::edit:: Oh, I forgot to answer your primary question. Can we estimate the impact of a large buy order on the share price? Not only can we estimate the impact, but we can know it explicitly.  Because the exchange publishes information on all the orders it knows about, anyone tracking that information can deduce that (in this example) there were exactly 100,000 shares waiting to be purchased at $15.00.  So if a ""large buy order"" of 1M shares comes in at $15.00, then we know that all of the people waiting to sell at $15.00 will be matched, and the new lowest ask price will be $15.01 (or whatever was the next lowest sell price that the exchange had previously published)." Costs are almost entirely salaries Apart from all the usual costs incurred by running a large, complex, business, ManU  are servicing debt that is getting up around the GBP500M mark. This is debt racked up by the Glazer family since purchasing the team, as well as debt they took with them to the team.  What sort of factors would affect their share price?  Product endorsements, ticket prices, attendance, and merchandise sales are all important contributors. But also, performance in the domestic league and in domestic and European cups are also factors. Should their participation falter for any reason, that ripples through everything (decrease in brand exposure) - and this is, along with the debt problem, the biggest risk. Edit: By the way, you are aware that this is an NYSE IPO; you can see how they have done on the FTSE over the past 10 years or so. The S&P is cap-weighted. So it's not as simple as buying 1 share of each of 500 stocks. (If it were, getting started might be doable, although adding to your position would take time and another large unit of money.) Can you do it? Sure? Do you have enough money to actually do it? I don't know. I'm happy to pay my .02-.03% to not worry about such things. You have to wait for three (business) days. That's the time it takes for the settlement to complete and for the money to get to your account. If you don't wait - brokers will still allow you to buy a new stock, but may limit your ability to sell it until the previous sale is settled. Here's a FAQ from Schwab on the issue. You must understand that: So, if you -- the prospective buyer -- are in Waukegan, do you take the train all the way to New York City just to buy 100 shares of stock?  No.  That would be absurdly expensive.  So, you hire an agent in NYC who will broker a deal for you in the exchange. Fast forward 100 years, to the time when instant communications is available.  Why do we now still need brokerages, when the Exchanges could set up web sites and let you do the trading? The answer is that the Exchanges don't want to have to develop the accounting systems to manage the transactions of hundreds of thousands of small traders, when existing brokerage firms already have those computerized processes in place and are opening their own web sites. Thus, in 2017 we have brokerage firms because of history. Interactive Brokers offers many foreign markets (19 countries) for US based investors. You can trade all these local markets within one universal account which is very convenient in my view. IB offering