Why does the share price tend to fall if a company's profits decrease, yet remain positive?
It has got to do with market perceptions and expectation and the perceived future prospects of the company. Usually the expectation of a company's results are already priced into the share price, so if the results deviate from these expectations, the share price can move up or down respectfully. For example, many times a company's share price may be beaten down for increasing profits by 20% above the previous year when the expectation was that it would increase profits by 30%. Other times a company's share price may rise sharply for making a 20% loss when the expectation was that it would make a 30% loss. Then there is also a company's prospects for future growth and performance. A company may be heading into trouble, so even though they made a $100M profit this year, the outlook for the company may be bleak. This could cause the share price to drop accordingly. Conversely, a company may have made a loss of $100M but its is turning a corner after reducing costs and restructuring. This can be seen as a positive for the future causing the share price to rise. Also, a company making $100M in profits would not put that all into the bank. It may pay dividends with some, it may put some more towards growing the business, and it might keep some cash available in case cash-flows fluctuate during the year. The company's value (which should be reflected in the share price) is not how much money it has in the bank, but something along the lines of 'how much money will it make between now and the end of times' (adjusted for time value of money and risk). So when you purchase a share of a company that has, say, little money in the bank, but expects to make 1M$ profit this year, 2M$ for the following 3 years, and say, nothing after, you are going to pay your fraction of 7M$ (minus some discount because of the risk involved). If now they announce that their profits were only 750k$, then people may think that the 2M$ are more likely to be 1.5M$, so the company's value would go to ~ 5M$. And with that, the market may perceive the company as more risky, because its profits deviated from what was expected, which in turn may reduce the company's value even further. You are omitting how the company made 120 million in the previous year and may be facing a shrinking market and thus have poor future prospects. If the company is shrinking, what will the shares be worth down the road. Remember companies like AOL or Blackberry? There was a time they had big profits before things changed which is the part you aren't considering here. If the company has lost something big on its earnings, e.g. the oil wells it owned have run out of reserves or the patents on its key drugs have expired, then there could be the perception that the company won't be able to compete in the future to continue to deliver earnings. Some companies may well end up going broke as one could look at GM for a company that used to be one of the largest car companies in the world and yet it ended up going broke. Aside from the market implications Victor and JB King mention, another possible reason is the dividends they pay. Usually, the dividends a company pays are dependent on the profit the company made. if a company makes less profit, the dividends turn out smaller. This might incite unrest among the shareholders, because this means that they get paid less dividends, which makes that share more likely to be sold, and thus for the price to fall. "Let's say you see a café. You're looking to buy a café so you walk into one and ask the manager how much profit he makes in a year. He says $N and you walk out and think to yourself, ""I'd be willing to pay $500,000 for this café."" You arrange to meet again to discuss purchasing the business (and he's looking for someone to purchase it).  You go into the store again the following day and the manager says, ""Sorry, I told you we make $N. I've checked the numbers and it's actually only $0.8N (20% lower than what you thought)."" Are you still willing to buy the café for $500,000 as well? No, of course you're not.  I think that this is a sufficient analogy to public companies." "In a rational market, the market caps (total value of all shares of the company) should be determined by the expected future profits of the company, plus the book value (that is the value of all assets that the company holds). The share price is then calculated as market caps divided by number of shares - a company worth a billion dollar could have a million shares at $1000 each or a billion shares at $1 each or anything in between.  When profits drop, every investor has to re-think what the expected future profits of the company are. If all the investors say ""I thought this company would make a billion profit in the next ten years, but based on the drop in profits I changed my mind and I think they will only make 500 million"", then the share price drops. On the other hand, if profits dropped because of some predictable event, then that drop was already priced into the share price. If the profits dropped less than expected, the share price might even go up.  You can see the opposite effect: Share price might be very high because everyone expects huge growth in profits over the next ten years. If profits grow less than expected, the share price will drop. Share price depends on predicted future profits, not on profits today." Let's use an example: You buy 10 machines for 100k, and those machines produce products sold for a total of 10k/year in profit (ignoring labor/electricity/sales costs etc). If the typical investor requires a rate of return of 10% on this business, your company would be worth 100k.  In investing terms, you would have a PE ratio of 10.  The immediately-required return will be lower if substantially greater returns are expected in the future (expected growth), and the immediately required return will be higher if your business is expected to shrink. If at the end of the year you take your 10k and purchase another machine, your valuation will rise to 110k, because you can now produce 11k in earnings per year.  If your business has issued 10,000 shares, your share price will rise from $10 to $11.  Note that you did not just put cash in the bank, and that you now have a higher share price. At the end of year 2, with 11 machines, lets imagine that customer demand has fallen and you are forced to cut prices.  You somehow produce only 10k in profit, instead of the anticipated 11k.  Investors believe this 10k in annual profit will continue into the forseable future.  The investor who requires 10% return would then only value your company at 100k, and your share price would fall back from $11 to $10.  If your earnings had fallen even further to 9k, they might value you at 90k (9k/0.1=$90k).  You still have the same machines, but the market has changed in a way that make those machines less valuable. If you've gone from earning 10k in year one with 10 machines to 9k in year two with 11 machines, an investor might assume you'll make even less in year three, potentially only 8k, so the value of your company might even fall to 80k or lower.  Once it is assumed that your earnings will continue to shrink, an investor might value your business based on a higher required rate of return (e.g. maybe 20% instead of 10%), which would cause your share price to fall even further.
In my opinion, the average investor should not be buying individual stocks. One reason why is that the average investor is not capable of reading financial statements and evaluating whether a stock is overpriced or underpriced. As such, they're often tempted to make buy/sell decisions based solely on the current value of a stock as compared to the price at which they bought it. The real reasons to buy (or sell) a stock is the expectation of future growth of the company (or continued profit and expected dividends). If you aren't able to analyze a company's financial statements and business plan, then you really aren't in a position to evaluate that company's stock price. So instead of asking whether to sell based on a recent drop in stock price, you should be investigating why the stock price is falling, and deciding whether those reasons indicate a trend that you expect to continue.  If you buy and sell stocks based solely on recent trends in the stock price, you probably will end up buying stocks that have recently risen and selling stocks that have recently fallen. In that case, you are buying high and selling low, which is a recipe for poor financial outcomes. Like others have already said, it may cause an immediate dip due to a large and sudden move in shares for that particular stock. However, if there is nothing else affecting the company's financials and investors perceive no other risks, it will probably bounce back a bit, but not back to the full value before the shares were issued. Why? Whenever a company issues more stock, the new shares dilute the value of the current shares outstanding, simply because there are now more shares of that stock trading on the market; the Earnings Per Share (EPS) Ratio will drop since the same profit and company value has to be spread across more shares. Example:  If a company is valued at $100 dollars and they have 25 shares outstanding, then the EPS ratio equates to $4 per share (100/25 = 4).  If the company then issues more shares (stock to employees who sell or keep them), let's say 25 more shares, then shares outstanding increase to 50, but the company's value still remains at $100 dollars. EPS now equates to $2 per share (100/50 = 2). Now, sometimes when shareholders (especially employees...and especially employees who just received them) suddenly all sell their shares, this causes a micro-panic in the market because investors believe the employees know something bad about the company that they don't. Other common shareholders then want to dump their holdings for fear of impending collapse in the company. This could cause the share price to dip a bit below the new diluted value, but again if no real, immediate risks exist, the price should go back up to the new, diluted value. Example 2: If EPS was at $4 before issuing more stock, and then dropped to $2 after issuing new stock, the micro-panic may cause the EPS to drop below $2 and then soon rebound back to $2 or more when investors realize no actual risk exists. After the dilution phase plays out, the EPS could actually even go above the pre-issuing value of $4 because investors may believe that since more stock was issued due to good profits, more profits may ensue. Hope that helps! Rather than take anyone's word for it (including and especially mine) you need to do think very carefully about your company; you know it far better than almost anyone else. Do you feel that the company values its employees? If it values you and your immediate colleagues then its likely that it not only values its other employees but also its customers which is a sign that it will do well. Does the company have a good relationship with its customers? Since you are a software engineer using a web stack I assume that it is either a web consultancy or has an e-commerce side to it so you will have some exposure to what the customers complain about, either in terms of bugs or UX difficulties. You probably even get bug reports that tell you what customer pain points are. Are customers' concerns valid, serious and damaging? If they are then you should think twice about taking up the offer, if not then you may well be fine. Also bear in mind how much profit is made on each item of product and how many you can possibly sell - you need to be able to sell items that have been produced. Those factors indicate how the future of the company looks currently, next you need to think about why the IPO is needed. IPOs and other share offerings are generally done to raise capital for the firm so is your company raising money to invest for the future or to cover losses and cashflow shortfalls? Are you being paid on time and without issues? Do you get all of the equipment and hiring positions that you want or is money always a limiting factor? As an insider you have a better chance to analyse these things than outsiders as they effect your day-to-day work. Remember that anything in the prospectus is just marketing spiel; expecting a 4.5 - 5.3% div yield is not the same as actually paying it or guaranteeing it. Do you think that they could afford to pay it? The company is trying to sell these shares for the maximum price they can get, don't fall for the hyped up sales pitch. If you feel that all of these factors are positive then you should buy as much as you can, hopefully far more than the minimum, as it seems like the company is a strong, growing concern. If you have any concerns from thinking about these factors then you probably shouldn't buy any (unless you are getting a discount but that's a different set of considerations) as your money would be better utilized elsewhere. In theory*, if a company has 1m shares at $10 and does a 10 for 1 split, then the day after it has 10m shares at $1 (assuming no market move). So both the price and the number of share change, keeping the total value of the company unchanged. Regarding your BIS, I suspect that the new number of shares has not been reported yet because it's an ETF (the number of shares in issue changes everyday due to in/out flows). Your TWX example is not ideal either because there was a spin off on the same day as the stock split so you need to separate the two effects. * Some studies have documented a positive stock split effect - one of the suggested reasons is that the stock becomes more liquid after the split. But other studies have rejected that conclusion, so you can probably safely consider that on average it will not have a material effect. Yes, the stock price drops on the ex-dividend date by roughly the amount of the dividend. There is even academic research testing this and confirming that the popular rule of thumb works well. I think the simple answer to your question is: Yes, when you sell, that drives down the price. But it's not like you sell, and THEN the price goes down. The price goes down when you sell. You get the lower price.  Others have discussed the mechanics of this, but I think the relevant point for your question is that when you offer shares for sale, buyers now have more choices of where to buy from. If without you, there were 10 people willing to sell for $100 and 10 people willing to buy for $100, then there will be 10 sales at $100. But if you now offer to sell, there are 11 people selling for $100 and 10 people buying for $100. The buyers have a choice, and for a seller to get them to pick him, he has to drop his price a little. In real life, the market is stable when one of those sellers drops his price enough that an 11th buyer decides that he now wants to buy at the lower price, or until one of the other 10 buyers decides that the price has gone too low and he's no longer interested in selling. If the next day you bought the stock back, you are now returning the market to where it was before you sold. Assuming that everything else in the market was unchanged, you would have to pay the same price to buy the stock back that you got when you sold it. Your net profit would be zero. Actually you'd have a loss because you'd have to pay the broker's commission on both transactions. Of course in real life the chances that everything else in the market is unchanged are very small. So if you're a typical small-fry kind of person like me, someone who might be buying and selling a few hundred or a few thousand dollars worth of a company that is worth hundreds of millions, other factors in the market will totally swamp the effect of your little transaction. So when you went to buy back the next day, you might find that the price had gone down, you can buy your shares back for less than you sold them, and pocket the difference. Or the price might have gone up and you take a loss. Shares are partial ownership of the company. A company can issue (not create) more of the shares it owns at any time, to anyone, at any price -- subject to antitrust and similar regulations. If they wanted to, for example, flat-out give 10% of their retained interest to charity, they could do so. It shouldn't substantially affect the stock's trading for others unless there's a completely irrational demand for shares. The stock market in general likes monetary easing. With lower interest rates and easy cheap money freely available, companies can borrow at reduced cost thus improving profits. As profits increase share prices generally follow. So as John Benson said Quantitative Easing usually has a positive effect on stocks. The recent negativity in the stock markets was partly due to the possibility of QE ending and interest rates being raised in the future.