If a company's assets are worth more than its market cap, can one say the shares must be undervalued?
You haven't mentioned how much debt your example company has. Rarely does a company not carry any kind of debt (credit facilities, outstanding bonds or debentures, accounts payable, etc.) Might it owe, for instance, $1B in outstanding loans or bonds? Looking at debt too is critically important if you want to conduct the kind of analysis you're talking about.  Consider that the fundamental accounting equation says: or, But in your example you're assuming the assets and equity ought to be equal, discounting the possibility of debt.  Debt changes everything.  You need to look at the value of the net assets of the company (i.e. subtracting the debt), not just the value of its assets alone. Shareholders are residual claimants on the assets of the company, i.e. after all debt claims have been satisfied.  This means the government (taxes owed), the bank (loans to repay), and bondholders are due their payback before determining what is leftover for the shareholders. Look at Price/book value and there are more than a few stocks that may have a P/B under 1 so this does happen. There are at least a couple of other factors you aren't considering here: Current liabilities - How much money is the company losing each quarter that may cause it to sell repeatedly. If the company is burning through $100 million/quarter that asset is only going to keep the lights on for another 2.5 years so consider what assumptions you make about the company's cash flow here. The asset itself - Is the price really fixed or could it be flexible? Could the asset seen as being worth $1 billion today be worth much less in another year or two? As an example, suppose the asset was a building and then real estate values drop by 40% in that area. Now, what was worth $1 billion may now be worth only $600 million. As something of a final note, you don't state where the $100 million went that the company received as if that was burned for operations, now the company's position on the asset is $900 million as it only holds a 90% stake though I'd argue my 2 previous points are really worth noting. The Following 6 Stocks Are Trading At or Below 0.5 x Book Value–Sep 2013 has a half dozen examples of how this is possible. If the $100 million was used to pay off debt, then the company doesn't have that cash and thus its assets are reduced by the cash that is gone. Depending on what the plant is producing the value may or may not stay where it is. If you want an example to consider, how would you price automobile plants these days? If the company experiences a reduction in demand, the plant may have to be sold off at a reduced price for a cynic's view here. Imagine a poorly run store in the middle of downtown Manhattan. It has been in the family for a 100 years but the current generation is incompetent regarding running a business. The store is worthless because it is losing money, but the land it is sitting on is worth millions.  So yes an asset of the company can be worth more than the entire company.  What one would pay for the rights to the land, vs the entire company are not equal.
Let's say that you bought a share of Apple for $10. When (if ever) their stock sold for $10, it was a very small company with a very small net worth; that is, the excess of assets over liabilities. Your $10 share was perhaps a 1/10,000,000th share of a tiny company. Over the years, Apple has developed both software and hardware that have real value to the world. No-one knew they needed a smartphone and, particularly, an iPhone, until Apple showed it to us. The same is true of iPads, iPods, Apple watches, etc. Because of the sales of products and services, Apple is now a huge company with a huge net worth. Obviously, your 1/10,000,000th share of the company is now worth a lot more. Perhaps it is worth $399. Maybe you think Apples good days are behind it. After all, it is harder to grow a huge company 15% a year than it is a small company. So maybe you will go into the marketplace and offer to sell your 1/10,000,000th share of Apple. If someone offers you $399, would you take it?  The value of stocks in the market is not a Ponzi scheme, although it is a bit speculative. You might have a different conclusion and different research about the future value of Apple than I do. Your research might lead you to believe the stock is worth $399. Mine might suggest it's worth $375. Then I wouldn't buy. The value of stocks in the market is based on the present and estimated future value of living, breathing companies that are growing, shrinking and steady. The value of each company changes all the time. So, then, does the price of the stock. Real value is created in the stock market when real value is created in the underlying company. "Market cap is synonymous with equity value, which is one way of thinking of a company's ""worth.""  The alternative would be enterprise value, which is calculated as follows:  Enterprise Value = Market Value of Equity + Market Value of Debt - Cash and Equivalents - Non-Operating Assets  Enterprise value is essentially ""how much is the firm worth to ALL providers of capital."" It can be viewed as ""if I wanted to buy the *entire* company, debt and all, what would I have to pay?""" A Breakdown of Stock Buy Backs has this bottom line on it: Are share buybacks good or bad? As is so often the case in finance, the question may not have a definitive answer. If a stock is undervalued and a buyback truly represents the best possible investment for a company, the buyback - and its effects - can be viewed as a positive sign for shareholders. Watch out, however, if a company is merely using buybacks to prop up ratios, provide short-term relief to an ailing stock price or to get out from under excessive dilution. Read more: http://www.investopedia.com/articles/02/041702.asp#ixzz3ZHdOf2dJ What is the reason that a company like AAPL is buying back its own   shares?  Offsetting dilution would be my main thought here as many employees may exercise options putting more stock out there that the company buys back stock to balance things. Does it have too much cash and it doesn't know what to do with it?  No as it could do dividends if it wanted to give it back to investors. So it is returning the cash back to investors? Not quite. While some investors may get cash from Apple, I'd suspect most shareholders aren't likely to see cash unless they are selling their shares so I wouldn't say yes to this without qualification. At the same time, the treasury shares Apple has can be used to give options to employees or be used in acquisitions for a couple of other purposes. The company gets it worth from how well it performs. For example if you buy company A for $50 a share and it beats its   expected earnings, its price will raise and lets say after a year or   two it can be worth around $70 or maybe more.This is where you can   sell it and make more money than dividends. Take a look at apple.  It has no debt.  So the ev is basically mkt cap - cash.  Also remember market cap is the float * share price nothing else.  Obviously share price takes into account the assets of the firm into perpituituy but the way you phrased it, adding debt , didnt sound quite right to me.  We remove cash since someone buying a company isn't going to pay for your cash.  In the transaction cash is distributed to share holders then the company is sold. Stocks represent partial ownership of the company. So, if you owned 51% of the stock of the company (and therefore 51% of the company itself), you could decide to liquidate all the  assets of the company, and you would be entitled to 51% of the proceeds from that sale.  In the example above, it would have to be Common Stock, as preferred stock does not confer ownership. *In a situation where it is not possible to buy 51% or more of the company (for example, it's not for sale), this is not possible, so the value of the stock could be much less. "Market caps is just the share price, multiplied by the number of shares. It doesn't represent any value (if people decide to pay more or less for the shares, the market cap goes up or down). It does represent what people think the company is worth.  NAV sounds very much like book value. It basically says ""how much cash would we end up with if we sold everything the company owns, paid back all the debt, and closed down the business? "" Since closing down the business is rarely a good idea, this underestimates the value of the business enormously. Take a hairdresser who owns nothing but a pair of scissors, but has a huge number of repeat customers, charges $200 for a haircut, and makes tons of money every year. The business has a huge value, but NAV = price of one pair of used scissors." Not directly. But companies benefit in various ways from a higher stock price. One way a high stock price can hurt a company is that many companies do share buybacks when the price is too high. Economically speaking, a company should only buy back shares when those shares are undervalued. But, management may have incentives to do buybacks at irrationally high prices.