Price Earnings Ratio
The P/E ratio is a measure of historic (the previous financial year) earnings against the current share price. If the P/E is high, this means that the market perceives a big increase in future earnings per share.  In other words, the perception is that this is a fast growing company.  Higher earnings may also equate to big increases in dividends and rapid expansion.  On the other hand, if the P/E is low, then there is a perception that either earnings per share are decreasing or that future growth in earnings is negligible.  In other words, low P/E equates to a perception of low future growth and therefore low prospects for future payout increases - possibly even decreases. The market is (rightly) usually willing to pay a premium for fast growing companies. "Your question asks us to explain why a false statement is true.  From the point of view of an investor, a high price to earnings ratio is not necessarily desirable. From the point of view of an investor, a desirable stock is one that is likely to provide future dividends or price increases that more than compensates for the risk of the stock.  This information cannot be inferred from the P/E ratio. So what does the P/E ratio tell us? The P/E ratio measures a stock's current price (i.e., the market's belief about its future earnings) divided by its recent past earnings.  A high ratio means the market thinks earnings in the future will be higher than they are now and have therefore bid the price up.  These can thought of as expensive stocks, and are often called ""growth"" stocks because their price is driven by the market's belief in future growth. Some individual high P/E stocks do live up to or exceed the market's expectation, but there's no evidence that this happens enough that they are more desirable as a group than low P/E stocks. If anything, the empirical evidence goes the other way."
"Here is how I would approach that problem: 1) Find the average ratios of the competitors: 2) Find the earnings and book value per share of Hawaiian 3) Multiply the EPB and BVPS by the average ratios. Note that you get two very different numbers.  This illustrates why pricing from ratios is inexact.  How you use those answers to estimate a ""price"" is up to you.  You can take the higher of the two, the average, the P/E result since you have more data points, or whatever other method you feel you can justify.   There is no ""right"" answer since no one can accurately predict the future price of any stock." While on the surface it might not make sense to pay more than one dollar to get just one dollar back, the key thing is that a good company's earnings are recurring each year. So, you wouldn't just be paying for the $1 dollar of earnings per share this year, but for the entire future stream of earnings per share, every year, in perpetuity -- and the earnings may grow over time too (if it remains a good company.) Your stock is a claim on a portion of the company's future. The brighter and/or more certain that future, the more investors are willing to pay for each recurring dollar of earnings. And the P/E ratio tells you, in effect, how many years it might take for your investment to earn back what you paid – assuming earnings remain the same. But you would hope the earnings would grow, too. When a company's earnings are widely expected to grow, the P/E for the stock is often higher than average. Bear in mind you don't actually receive the company's earnings, since management often decides to reinvest all or a portion of it to grow the company. Yet, many companies do pay a portion of earnings out as dividends. Dividends are money in your pocket each year. 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. "To know if a stock is undervalued is not something that can be easily assessed (else, everybody would know which stock is undervalued and everybody will buy it until it reaches its ""true"" value). But there are methods to assess the value of a company, I think that the 3 most known methods are: If the assets of the company were to be sold right now and that all its   debts were to be paid back right now, how much will be left? This   remaining amount would be the fundamental value of your company. That method could work well on real estate company whose value is more or less the buildings that they own minus of much they borrowed to acquire them. It's not really usefull in the case of Facebook, as most of its business is immaterial. I know the value of several companies of the same sector, so if I want   to assess the value of another company of this sector I just have to   compare it to the others. For example, you find out that simiral internet companies are being traded at a price that is 15 times their projected dividends (its called a Price Earning Ratio). Then, if you see that Facebook, all else being equal, is trading at 10 times its projected dividends, you could say that buying it would be at a discount. A company is worth as much as the cash flow that it will give me in   the future If you think that facebook will give some dividends for a certain period of time, then you compute their present value (this means finding how much you should put in a bank account today to have the same amount in the future, this can be done by dividing the amount by some interest rates). So, if you think that holding a share of a Facebook for a long period of time would give you (at present value) 100 and that the share of the Facebook is being traded at 70, then buy it. There is another well known method, a more quantitative one, this is the Capital Asset Pricing Model. I won't go into the details of this one, but its about looking at how a company should be priced relatively to a benchmark of other companies. Also there are a lot's of factor that could affect the price of a company and make it strays away from its fundamental value: crisis, interest rates, regulation, price of oil, bad management, ..... And even by applying the previous methods, the fundemantal value itself will remain speculative and you can never be sure of it. And saying that you are buying at a discount will remain an opinion. After that, to price companies, you are likely to understand financial analysis, corporate finance and a bit of macroeconomy." There's no unique way to split the profit, it's about claims and arguments.  I propose the approach based on internal rate of return. Consider we have a project with cash flow -500 at the beginning, -1000 at 3 months and +2300 (1000 profit - 200 fee + 1500 of initial investments) at 1 year. The balance looks as follows (simple compounding): The solution is r = 64% (not bad!). Now, the value of the 1-st investment is 500*(1+0.64)=820 and the value of the second is 1000*(1+0.64*0.75)=1480 (at t=1 year). This gives the shares of 35.65% (820/2300) and 64.35% (1480/2300). Then split the profit according to the shares. This is fine, but I'd probably spend a moment introducing WACC and it's estimation. It's also useful to link up the enterprise value to share price, so just also mentioning the debt subtraction to get equity value and division by shares for price.  Keep in mind you're usually given like a minute to answer this, so you can afford to be a bit more detailed in some parts. Reading and analyzing financial statements is one of the most important tasks of Equity Analysts which look at a company from a fundamental perspective.  However, analyzing a company and its financial statements is much more than just reading the absolute dollar figures provided in financial statements: You need to calculate financial ratios which can be compared over multiple periods and companies to be able to gauge the development of a company over time and compare it to its competitors. For instance, for an Equity Analyst, the absolute dollar figures of a company's operating profit is less important than the ratio of the operating profit to revenue, which is called the operating margin.  Another very important figure is Free Cash Flow which can be set in relation to sales (= Free Cash Flow / Sales).  The following working capital related metrics can be used as a health check for a company and give you early warning signs when they deviate too much: You can either calculate those metrics yourself using a spreadsheet (e.g. Excel) or use a professional solution, e.g. Bloomberg Professional, Reuters Eikon or WorldCap. The expense ratio is stated as an annual figure but is often broken down to be taken out periodically of the fund's assets. In traditional mutual funds, there will be a percent of assets in cash that can be nibbled to cover the expenses of running the fund and most deposits into the fund are done in cash. In an exchange-traded fund, new shares are often created through creation/redemption units which are baskets of securities that make things a bit different. In the case of an ETF, the dividends may be reduced by the expense ratio as the trading price follows the index usually. Expense ratios can vary as in some cases there may be initial waivers on new funds for a time period to allow them to build an asset base. There is also something to be said for economies of scale that allow a fund to have its expense ratio go down over time as it builds a larger asset base. These would be noted in the prospectus and annual reports of the fund to some degree. SPDR Annual Report on page 312 for the Russell 3000 ETF notes its expense ratio over the past 5 years being the following: 0.20% 0.20% 0.22% 0.20% 0.21% Thus, there is an example of some fluctuation if you want a real world example.