The difference between the two numbers is that the market size of a particular product is expressed as an annual number ($10 million per year , in your example).
The market cap of a stock, on the other hand, is a long-term valuation of the company.
money.stackexchange.com/users/10997/Ben Miller - Remember Monica
First read mhoran's answer, Then
this - If the company sold nothing but refrigerators, and had 40% market share, that's $4M
/yr in sales.
If they have a 30% profit margin, $1.2M in profit each year.
A P/E of 10 would give a stock value totaling $12M, more than the market size.
The numbers are related, of course, but one isn't the maximum of the other.
money.stackexchange.com/users/187/JTP - Apologise to Monica
If you are calculating: the market size as the annual sales of all refrigerators at $10 million; and the market cap as the value of Company A's shares times the number of shares being equal to $20 million; keep in mind that company A probably also sells washers, dryers, stoves, dish washers....
Each of which has their own market size.
Also remember that people pay X times the value of earnings per share, so the value depends not on sales but on earnings, and expected growth.
money.stackexchange.com/users/5414/mhoran_psprep
The quickest way to approach this question is to first understand that it compares flows vs. levels.
Market size is usually stated as an annual or other period figure, e.g. "The market size of refrigerators will be $10mn in 2019."
This is a flow figure.
Market capitalization is a level figure at any given point in time, e.g. "The market cap of the company was $20 million at the end of its last fiscal quarter."
Confusion sometimes occurs when levels and flows are used loosely for comparisons.
It is common for media to make statements such as "Joe Billionaire is worth more than the GDP of Roselandia."
That is comparing a current level (net worth) with an annual flow (GDP).
With this in mind, there are a variety of conditions where a company's equity market value will exceed its market size.
The most extreme example is an innovating, development-stage enterprise, say, a biotech company, developing a new market for a new product; the current market size may be nil while the enterprise is worth something greater.
The primary reason however for situations where a company's equity market cap is greater than its market size is usually that the financial market expects the enterprise (and oftentimes its market, though this isn't necessary) to grow substantially over time and hence the discounted value of the company may be greater than the current or near future market size.
A final example: US annual GDP (which comprises of much more than corporate incomes and profits) for 2014 was about $17.4tn while the nation's total equity market value in 2014 was $25.1tn, both according to the World Bank.
That latter figure also doesn't include the trillions of corporate debts these companies have issued so the total market cap of US, Inc. is substantially greater than $25.1tn.
money.stackexchange.com/users/44014/Catalyx
It is ALWAYS possible for a company's valuation in the market to be larger than the market it serves, and in fact it is not uncommon.
There's valid argument that Uber would be a good example of this, with a market cap of more than $60 billion.
Market cap is the total value of all shares outstanding.
Keep in mind that what a company's shares trade for is less a reflection of its past (or, to some degree, even present) revenue activity and more of a speculative bet on what the company will do in the future.
money.stackexchange.com/users/44016/Daniel Anderson
A company's valuation includes its assets, in addition to projected earnings.
Aside from the obvious issue that "projected earnings" can be wildly inaccurate or speculative (as in the case of startups and fast-moving industries like technology), a company's assets are not necessarily tied to the market the company is in.
For the sake of illustration, say the government were to ban fast food tomorrow, and the market for that were to go all the way to zero.
McDonald's would still have almost 30 billion dollars worth of real estate holdings that would surely make the company worth something, even though it would have to stop selling its products.
Similarly, Apple is sitting on approximately $200 billion dollars in cash and securities in overseas subsidiaries.
Even if they never make another cent selling iPhones and such, the company is still worth a lot because of those holdings.
" Corporate raiders " back in the 70's and 80's made massive personal fortunes exploiting this disconnect in undervalued companies that had more assets than their market cap, by getting enough ownership to liquidate the company's assets.
Oliver Stone even made a movie about the phenomenon .
So yes, it's certainly possible for a company to be worth more than the size of the market for its products.
money.stackexchange.com/users/25527/HopelessN00b
You are comparing two things that are not comparable.
The "market size" would be the total annual revenue in one market, in this year.
The "market cap” of a company is the number of shares multiplied by the share price.
This should be equal to the total profit that the company is going to make through its life time, taking into account that you would get interest on an investment, so future profits have to be counted less accordingly.
So if the "market size" is ten million dollars, and a company has four million revenue in that market with one million profit, and everyone thinks that company will continue making that profit for the next fifty years, then surely one million a year for the next 50 years is worth more than ten million.
That's if the market stands still.
If the "market size" is ten million, and we expect that market size to double for the next three years, then the market size is still ten million, but a company having a 40% share of a market growing at that speed is going to be worth a lot more!
money.stackexchange.com/users/13791/gnasher729
Let's say for example, the refrigerator market is sized at 10 million dollars (hypothetical example), if the market cap of a company is, say, 20 million, is it worth investing in the stock? Can it ever happen that a company's market cap exceeds the total market size (or say addressable market size)?
What does it mean for a company to have its market cap larger than the market size?
money.stackexchange.com
<stock-markets><market-capitalization>
money.stackexchange.com/questions/65872
money.stackexchange.com/users/43990/user93496
The market value of a stock is a long-term valuation of the company. It is the number of shares multiplied by the share price. Market size is expressed as a period figure. It would be the total annual revenue in one period. First you should understand that this compares flows with levels.  The market cap of a company is the number of shares multiplied by the share price and is a long-term valuation of the company.Market size is the total annual revenue in one market, in one year.   
First you should understand that this compares flows vs. levels.   The market cap of a company is the number of shares multiplied by the share price and is a long-term valuation of the company. Market size is the total annual revenue in one market, in one year.   