Company A is buying company B, what happens to the stock?
It depends on the timing of the events. Sometimes the buying company announces their intention but the other company doesn't like the deal. It can go back and forth several times, before the deal is finalized. The specifics of the deal determine what happens to the stock: The deal will specify when the cutoff is. Some people want the cash, others want the shares.  Some will speculate once the initial offer is announced where the final offer (if there is one) will end up. This can cause a spike in volume, and the price could go up or down. Regarding this particular deal I did find the following: http://www.prnewswire.com/news-releases/expedia-to-acquire-orbitz-worldwide-for-12-per-share-in-cash-300035187.html Additional Information and Where to Find It Orbitz intends to file with the SEC a proxy statement as well as other   relevant documents in connection with the proposed transaction with   Expedia. The definitive proxy statement will be sent or given to the   stockholders of Orbitz and will contain important information about   the proposed transaction and related matters. SECURITY HOLDERS ARE   URGED TO READ THE PROXY STATEMENT CAREFULLY WHEN IT BECOMES AVAILABLE   AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY   AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, BECAUSE THEY WILL   CONTAIN IMPORTANT INFORMATION. The proxy statement and other relevant   materials (when they become available), and any other documents filed   by Expedia or Orbitz with the SEC, may be obtained free of charge at   the SEC's website, at www.sec.gov. In addition, security holders will   be able to obtain free copies of the proxy statement from Orbitz by   contacting Investor Relations by mail at ATTN: Corporate Secretary,   Orbitz Worldwide, Inc., 500 W. Madison Street, Suite 1000, Chicago,   Illinois 60661. I think the correct statement is that Expedia wants to buy Orbitz for $12/share. The market price is $11, which means there is somebody willing to sell for that price. But you can't say that a stock price of $11 means that everybody is willing to sell for that price. And Expedia is unlikely to bid $12/share for just 40% of Orbitz shares; they'll want at least a controlling majority.
"Have the stock certificate in with a letter from the previous owner of the company from what I can tell in the letter these stocks were distributed from the owner himself stating ""after evaluation we have determined that your investment in this company is worth 10,000 shares at $1.00 a piece"" as well as I believe these shares were also acquired when the company was going through name changes or their company was bought" I do not know for sure so do not quote me on this. But I would assume that you will get paid out to what the value of the buyout is.  Example if your company has 100 private shares and you own 1 share (1%), and the company sells for $1,000,000. Your share will be worth 1% of the $1 million. "Going private does not mean that the company buys its own shares, only that the freely traded shares are bought up by a private entity (this can be management =&gt; ""management buy-out"" or it can be a private investor). The stock is then not traded publicly and the company gets rid of a whole slew of compliance obligations.   In your stated example the company would essentially convert all its stock to treasury stock, which does not pay dividends and has no voting rights. From what I gather from some googling this would actually imply that the company would liquidate itself since it now has no capital anymore. Not sure on this though, an accountant might be able to help here..." You need to be clear about who gets your money: If you pay the existing owner $25K and (s)he gives you half the business, then you now own half of a $50K business an the original owner has an extra $25K in spending cash.  The value of the business has not changed. If you contribute $25 to the company, new equity shares are created.  Shares should be priced correctly, meaning you now own $25K worth of shares in a company worth $75k, so you should have 1/3 of the outstanding shares (counting both old and new shares).  If you get more or less than this, then the transaction has happened in an unfair way. If this is a public company, that would most likely be illegal and the SEC may throw you in jail.  If it was a private company and your friend created enough shares that you own half the company, then (s)he has given you a gift. If you are contributing to the company at a fair price, you would need to contribute $50K in order to end up with half the equity of the new and now more valuable firm. In that case the firm would be worth $100K after your contribution. Bottom line, this is a common and not complex transaction and should end up with a completely fair outcome.  Any unfair situation you can imagine is probably based on false assumptions or a situation where a non-arms-length transaction is transferring wealth contrary to normal rules and procedures. Because the stock still has the same value as the money paid for it - you are just exchanging one asset for another (of course the stock value starts to change immediately, but for the accounting the fictional value is the buying price). For the accounting, it is similar to changing a 100$ bill in five 20$ bills - same value, still assets. If the company is non-public, your hands are tied. Most startups have a Stock Option Plan with specific rules on the shares. In almost all cases, they have a Transferability clause preventing transfers of options and shares unless approved by the company (who would almost always say no). Additionally, they usually have a Right of First Refusal (ROFR), which states that if shares are going to be transferred, the company gets the chance to buy it first. In your case, the company may argue your friend would sell you the shares for free and the company would exercise their ROFR and buy back the shares for free. There is not much you can do in this case. You may be able to write up a contract between your friend and you, but it would be costly and possibly not worth the effort. You may be better off asking for a lump sum or some other sort of compensation. Additionally, your friend might want to be careful with this idea. You could potentially gain access to sensitive company tools/documents which could get them in a lot of trouble. "There is one other factor that I haven't seen mentioned here.  It's easy to assume that if you buy a stock, then someone else (another stock owner) must have sold it to you.  This is not true however, because there are people called ""market makers"" whose basic job is to always be available to buy shares from those who wish to sell, and sell shares to those who wish to buy.  They could be selling you shares they just bought from someone else, but they also could simply be issuing shares from the company itself, that have never been bought before. This is a super oversimplified explanation, but hopefully it illustrates my point." Unless I am missing something subtle, nothing happens to the buyer. Suppose Alice wants to sell short 1000 shares of XYZ at $5.  She borrows the shares from Bob and sells them to Charlie.  Now Charlie actually owns the shares; they are in his account. If the stock later goes up to $10, Charlie is happy; he could sell the shares he now owns, and make a $5000 profit. Alice still has the $5000 she received from her short sale, and she owes 1000 shares to Bob.  So she's effectively $5000 in debt.  If Bob calls in the loan, she'll have to try to come up with another $5000 to buy 1000 shares at $10 on the open market.   If she can't, well, that's between her and Bob.  Maybe she goes bankrupt and Bob has to write off a loss.   But none of this has any effect on Charlie!  He got the shares he paid for, and nobody's going to take them away from him.  He has no reason to care where they came from, or what sort of complicated transactions brought them into Alice's possession.  She had them, and she sold them to him, and that's the end of the story as far as he's concerned. 1) Explicitly, how a company's share price in the secondary market affects the company's operations. (Simply: How does it matter to a company that its share price drops?) I have a vague idea of the answer, but I'd like to see someone cover it in detail.  2) Negative yield curves, or bonds/bills with negative yields  Thanks! There is a strategy called merger-arbitrage where you buy the stock of the acquired company when it sells for less than the final acquisition price. Usually the price will rise to about the acquisition price fairly rapidly after the merge is announced, so you have to move fast. The danger is that the merger gets called off (regulatory reasons, the acquired company board votes no) and you get left holding shares bought at a price higher than the price after the merger collapses. This is kind of an advanced strategy and a tough one to back test since each M&A deal is unique. Shareholders provide their capital to the company via buying issued stock from said company. In a way they are owning the company through that transaction by a percentage. Ownership is now in question depending on how big the company is. Apple? You have a snowballs chance in Hell trying to assert your 'ownership' of your one share of their stock. So in theory yes they technically own part of the company but the decision making is up the board. Though the shareholders can voice their opinion and give up their vote via proxy voting. I'm a little rusty please correct me if you must. As littleadv says it depends on the local laws.   Normally one shouldn't be too worried. Typically the stocks given to the employees are a very small portion of the overall stocks ... the owners would not try to jeopardize the deal just so that they make an incrementally small amount of money ... they would rather play safe than get into such a practice. During a stock split the only thing that changes is the number of shares outstanding.  Typically a stock splits to lower its price per share.  Sometimes if a company's value is falling it will do a reverse split where X shares will be exchanged for Y shares.  This is typically done to avoid being de-listed from an exchange if the price per share falls below a certain threshold, usually $1.  Again the only thing changing is the number of shares outstanding.  A 20 for 1 reverse split means for every 20 shares outstanding the shareholder will be granted one new share. Example X Co. has 1,000,000 shares outstanding for a price of $100 per share.  It does a 1 for 10 split.  Now there are 10,000,000 shares outstanding for a price of $10 per share. Example Y Co has 1,000,000 shares outstanding for a price of $1 per share.  It does a 10 for 1 reverse split.  Now there are 100,000 shares outstanding for a price of $10. Quickly looking at the news for ASTI it looks like it underwent a 20 for 1 reverse split.  You should probably look at your statements and ask your broker how the arithmetic worked in your case. Investopedia links for Reverse Stock Split and Stock Split Generally speaking, if the acquiring company buys less than 50% of the target, the acquirer would not claim any income until there was a dividend or the equity stock appreciated. With a dividend, the acqiring company would participate in and book earnings on the cash received. Without a dividend, equity stock of the target should theoretically rise to reflect higher retained income and the acquirer would book an unrealized gain to gross profit (I think). If the acquiring company buys more than 50% of the target, it is likely all revenues and expences would be consolidated and included in the acquiring company's respective accounts as if it was one cohesive whole. Any residual stake in the target owned by a third party would be reflected in a Minority Interest expense on the acquiring company's income statement. ELI5 - you sell something that you don't own with the expectation that it will go down, and then you buy it back when it goes down in order to lock in profit.  You are charged fees to borrow the stock from someone else who currently owns it, and you also run the risk of the market going against you by going up.