When does a low PE ratio not indicate a good stock?
"Yes, there are situations where a stock is a bad buy in spite of a low PE. PE ratio tells you the current share price divided by the prior 4 quarters earnings per share. It does not consider: Imagine someone walked up to you and said, ""Do you want to buy a piece of my business? I'll sell you 1% of it for $1000. Last year the business earned $25000."" A quick calculation shows a PE of 4 [$1000/($25000 *.01)]. Even though this PE is comparatively low, you wouldn't buy in without a lot more info. What kinds of things might you ask? PE is one tiny component of an informed investment decision." PE can be misleading when theres a good risk the company simply goes out of business in a few years. For this reason some people use PEG, which incorporates growth into the equation. "Some companies have a steady, reliable, stream of earnings. In that case, a low P/E ratio is likely to indicate a good stock. Other companies have a ""feast or famine"" pattern, great earnings one year, no earnings or losses the following year. In that case, it is misleading to use a P/E ratio for a good year, when earnings are high and the ratio is low. Instead, you have to figure out what the company's AVERAGE earnings may be for some years, and assign a P/E ratio to that."
PEG is Price to Earnings Growth.  I've forgotten how it's calculated, I just remember that a PEG ratio of 1-2 is attractive by Graham & Dodd standards. There are books on the subject of valuing stocks. P/E ratio has nothing directly to do with the value of a company. It may be an indication that the stock is undervalued or overvalued, but does not indicate the value itself. The direct value of company is what it would fetch if it was liquidated. For example, if you bought a dry cleaner and sold all of the equipment and receivables, how much would you get? To value a living company, you can treat it like a bond. For example, assume the company generates $1 million in profit every year and has a liquidation value of $2 million. Given the risk profile of the business, let's say we would like to make 8% on average per year, then the value of the business is approximately $1/0.08 + $2 = $14.5 million to us. To someone who expects to make more or less the value might be different. If the company has growth potential, you can adjust this figure by estimating the estimated income at different percentage chances of growth and decline, a growth curve so to speak. The value is then the net area under this curve.  Of course, if you do this for NYSE and most NASDAQ stocks you will find that they have a capitalization way over these amounts. That is because they are being used as a store of wealth. People are buying the stocks just as a way to store money, not necessarily make a profit. It's kind of like buying land. Even though the land may never give you a penny of profit, you know you can always sell it and get your money back. Because of this, it is difficult to value high-profile equities. You are dealing with human psychology, not pennies and dollars. Typically a private company is hit by demand supply issues and cost of inputs. In effect at times the cost of input may go up, it cannot raise the prices, because this will reduce demand. However certain public sectors companies, typically in Oil & Engery segements the services are offered by Public sector companies, and the price they charge is governed by Regulatory authorities. In essence the PG&E, the agreement for price to customers would be calculated as cost of inputs to PG&E, Plus Expenses Plus 11.35% Profit. Thus the regulated price itself governs that the company makes atleast 11.35% profit year on year. Does this mean that the shares are good buy?  Just to give an example, say the price was $100 at face value, So essentially by year end logically you would have made 111.35/-. Assuming the company did not pay dividend ... Now lets say you began trading this share, there would be quite a few people who would say I am ready to pay $200 and even if I get 11.35 [on 200] it still means I have got ~6% return. Someone may be ready to pay $400, it still gives ~3% ... So in short the price of the stock would keep changing depending how the market percieves the value that a company would return. If the markets are down or the sentiments are down on energy sectors, the prices would go down.  So investing in PG&E is not a sure shot way of making money. For actual returns over the years see the graph at http://www.pgecorp.com/investors/financial_reports/annual_report_proxy_statement/ar_html/2011/index.htm#CS And the kind folk at Yahoo Finance came to the same conclusion.  Keep in mind, book value for a company is like looking at my book value, all assets and liabilities, which is certainly important, but it ignores my earnings.  BAC (Bank of America) has a book value of $20, but trades at $8. Some High Tech companies have negative book values, but are turning an ongoing profit, and trade for real money. A value of zero or a negative value makes the percent change meaningless. Saying 100% when going from 0 to some other value is simply wrong. I have seen a similar situation several times when looking at a public company with a loss last quarter. On Google Finance or some other service, the PE ratio will be blank, N/A, or something like that. If the company does not currently have earnings, then the PE ratio is meaningless. Likewise, if the company previously did not have earnings, then the percent change of the earnings is meaningless. Also consider the example where the previous value was negative. If the previous value was negative 1 and the current value is positive 99, then this happens: A negative change? But the value went up! Obviously that value does not make sense and should not be shown. In my IRA I try to find stocks that are in growing sectors but have are undervalued by traditional metrics like PE or book value; I make sure that they have lower debt levels than their peers, are profitable, and at least have comparable margins.   I started trading options to make better returns off of indices or etfs. It seems overlooked but it's pretty good, in another thread I was telling someone about my strategy buy applying it to thier portfolio: https://www.reddit.com/r/options/comments/77bt17/ive_been_trading_stocks_for_a_year_and_am/dolydu8/?context=3  I double checked, I told him/her I would buy the DIA Jan 19 2018 call 225 for 795. 8 days later it's trading for 1085. Nearly 50% in a week. It'll never be 300% earnings returns, but I'm happy to take it slow.   Shorting is a very different animal it takes a lot to get things right. This can arise with very thinly traded stocks for large blocks of shares. If the market only has a few thousand dollars available at between 8.37 and 12.5 the price is largely meaningless for people who want to invest in hundreds of thousands/millions of dollars worth, as the quoted price can't get them anywhere near the number of shares they want. How liquid is the stock in question? The intrinsic value of a company is based on their profits year on year along with their expect future growth. A company may be posting losses, but if the market determines there's any chance they will turn a profit one day, or be a takeover target, it assigns value to those shares. In normal times, you'll observe a certain P/E range. Price to earning ratio is a simple way to say the I will pay X$ for a dollar's worth of earnings. A company that's in a flat market and not growing may command a P/E of only 10. Another company that's expanding their products and increasing market share may see a 20 P/E. Both P/Es are right for the type of company involved. In general, liquidity is a good thing, because it means it is easy for you to buy or sell a stock.   Since high liquidity stocks have a lot of trading, the bid-ask spreads tend to be pretty low.  That means you can go into the market and trade easily and cheaply at just about any time.  For low liquidity stocks, the bid-ask spreads can get pretty high, so it can make it hard or expensive to get into or out of your trades. On the flip side, everyone pays attention to high liquidity stocks, so it's harder to get an edge in your trading.  For a company like Microsoft there are 30-50 full time analysts that cover them, thousands of professional traders and millions of investors in general all reading the same new articles and looking through the same financials as you.  But in low liquidity stocks, there probably aren't any analysts, a few professional traders and maybe a few thousand total investors, so it can be easier to find a good buy (or sell). In general, high liquidity doesn't mean that everyone is selling or everyone is buy, it just means everyone is trading. "It's not either or.  Much of the time the value of the stock has some tangible relation to the financial prospects of the company. The value of Ford and GM stock rose when they were selling a lot of cars, and collapsed when their cars became unpopular. Other companies (Enron for example) frankly 'cook the books' to make it appear they are prospering, when they are actually drowning in debt and non-performing assets. So called ""penny stocks"" have both low prices and low volumes and are susceptible to ""pump and dump"" schemes, where a manipulator buys a bunch of the stock, touts the stock to the world, pointing to the recent increase in price. They then sell out to all the new buyers, and the price collapses.  If you are going to invest in the stock market it's up to you to figure out which companies are which." "It's been said before, but to repeat succinctly, a company's current share price is no more or less than what ""the market"" thinks that share is worth, as measured by the price at which the shares are being bought and sold. As such, a lot of things can affect that price, some of them material, others ethereal. A common reason to own stock is to share the profits of the company; by owning 1 share out of 1 million shares outstanding, you are entitled to 1/1000000 of that company's quarterly profits (if any). These are paid out as dividends. Two key measurements are based on these dividend payments; the first is ""earnings per share"", which is the company's stated quarterly profits, divided by outstanding shares, with the second being the ""price-earnings ratio"" which is the current price of the stock divided by its EPS. Your expected ""yield"" on this stock is more or less the inverse of this number; if a company has a P/E ratio of 20, then all things being equal, if you invest $100 in this stock you can expect a return of $5, or 5% (1/20). As such, changes in the expected earnings per share can cause the share price to rise or fall to maintain a P/E ratio that the pool of buyers are willing to tolerate. News that a company might miss its profit expectations, due to a decrease in consumer demand, an increase in raw materials costs, labor, financing, or any of a multitude of things that industry analysts watch, can cause the stock price to drop sharply as people look for better investments with higher yields. However, a large P/E ratio is not necessarily a bad thing, especially for a large stable company. That stability means the company is better able to weather economic problems, and thus it is a lower risk. Now, not all companies issue dividends. Apple is probably the most well-known example. The company simply retains all its earnings to reinvest in itself. This is typically the strategy of a smaller start-up; whether they're making good money or not, they typically want to keep what they make so they can keep growing, and the shareholders are usually fine with that. Why? Well, because there's more than one way to value a company, and more than one way to look at a stock. Owning one share of a stock can be seen quite literally as owning a share of that company. The share can then be valued as a fraction of the company's total assets.  Sounds simple, but it isn't, because not every asset the company owns has a line in the financial statements. A company's brand name, for instance, has no tangible value, and yet it is probably the most valuable single thing Apple owns. Similarly, intellectual property doesn't have a ""book value"" on a company's balance sheet, but again, these are huge contributors to the success and profitability of a company like Apple; the company is viewed as a center of innovation, and if it were not doing any innovating, it would very quickly be seen as a middleman for some other company's ideas and products. A company can't sustain that position for long even if it's raking in the money in the meantime. Overall, the value of a company is generally a combination of these two things; by owning a portion of stock, you own a piece of the company's assets, and also claim a piece of their profits. A large company with a lot of material assets and very little debt can be highly valued based solely on the sum of its parts, even if profits are lagging. Conversely, a company more or less operating out of a storage unit can have a patent on the cure for cancer, and be shoveling money into their coffers with bulldozers." I don't think it makes sense to allow accounting numbers that you are not sure how to interpret as being a sell sign.  If you know why the numbers are weird and you feel that the reason for it bodes ill about the future, and if you think there's a reason this has not been accounted for by the market, then you might think about selling.  The stock's performance will depend on what happens in the future. Financials just document the past, and are subject to all kinds of lumpiness, seasonality, and manipulation. You might benefit from posting a link to where you got your financials.  Whenever one computes something like a dividend payout ratio, one must select a time period over which to measure.  If the company had a rough quarter in terms of earnings but chose not to reduce dividends because they don't expect the future to be rough, that would explain a crazy high dividend ratio.  Or if they were changing their capital structure.  Or one of many other potentially benign things.   Accounting numbers summarize a ton of complex workings of the company and many ratios we look at could be defined in several different ways.  I'm afraid that the answer to your question about how to interpret things is in the details, and we are not looking at the same details you are. I look at the following ratios and how these ratios developed over time, for instance how did valuation come down in a recession, what was the trough multiple during the Lehman crisis in 2008, how did a recession or good economy affect profitability of the company. Valuation metrics: Enterprise value / EBIT (EBIT = operating income) Enterprise value / sales (for fast growing companies as their operating profit is expected to be realized later in time) and P/E Profitability: Operating margin, which is EBIT / sales Cashflow / sales Business model stability and news flow To be fair, the analyst is talking about the book value of the firm. Basically, the value of all the stuff it owns now. There are plenty of companies with negative book value that can justify a positive share price. Ford, for instance, had negative book value but positive future earnings. "There are two common types of P/E ratio calculations: ""trailing"" and ""forward"" (and then there are various mixes of the two). Trailing P/E ratios are calculated as [current price] / [trailing 12-month EPS]. An alternative is the Forward P/E ratio, which is based on an estimate of earnings in the coming 12 months. The estimate used is usually called ""consensus"" and, to answer your question, is the average estimate of analysts who cover the stock. Any reputable organization will disclose how they calculate their financials. For example, Reuters uses a trailing ratio (indicated by ""TTM"") on their page for BHP. So, the first reason a PE ratio might not jump on an announcement is it might be forward looking and therefore not very sensitive to the realized earnings. The second reason is that if it is a trailing ratio, some of the annual EPS change is known prior to the annual announcement. For example, on 12/31 a company might report a large drop in annual earnings, but if the bulk of that loss was reported in a previous quarterly report, then the trailing EPS would account partially for it prior to the annual announcement.  In this case, I think the first reason is the culprit. The Reuters P/E of nearly 12 is a trailing ratio, so if you see 8 I'd think it must be based on a forward-looking estimate."