Mr. Market
Whenever Charlie and I buy common stocks for Berkshire's insurance companies (leaving aside arbitrage purchases, discussed later) we approach the transaction as if we were buying into a private business.  We look at the economic prospects of the business, the people in charge of running it, and the price we must pay.  We do not have in mind any time or price for sale.  Indeed, we are willing to hold a stock indefinitely so long as we
expect the business to increase in intrinsic value at a satisfactory rate.  When investing, we view ourselves as business analysts - not as market analysts, not as macroeconomic analysts, and not even as security analysts.

     Our approach makes an active trading market useful, since it periodically presents us with mouth-watering opportunities.  But by no means is it essential: a prolonged suspension of trading in the securities we hold would not bother us any more than does the lack of daily quotations on World Book or Fechheimer.  Eventually, our economic fate will be determined by the economic fate of the business we own, whether our ownership is partial or total.

     Ben Graham, my friend and teacher, long ago described the mental attitude toward market fluctuations that I believe to be most conducive to investment success.  He said that you should imagine market quotations as coming from a remarkably accommodating fellow named Mr. Market who is your partner in a
private business.  Without fail, Mr. Market appears daily and names a price at which he will either buy your interest or sell you his.

     Even though the business that the two of you own may have economic characteristics that are stable, Mr. Market's quotations will be anything but.  For, sad to say, the poor fellow has incurable emotional problems.  At times he feels euphoric and can see only the favorable factors affecting the business.  When in
that mood, he names a very high buy-sell price because he fears that you will snap up his interest and rob him of imminent gains.  At other times he is depressed and can see nothing but trouble ahead for both the business and the world.  On these occasions he will name a very low price, since he is terrified that you will
unload your interest on him.

     Mr. Market has another endearing characteristic: He doesn't mind being ignored.  If his quotation is uninteresting to you today, he will be back with a new one tomorrow.  Transactions are strictly at your option.  Under these conditions, the more manic-depressive his behavior, the better for you.

     But, like Cinderella at the ball, you must heed one warning or everything will turn into pumpkins and mice: Mr. Market is there to serve you, not to guide you.  It is his pocketbook, not his wisdom, that you will find useful.  If he shows up some day in a particularly foolish mood, you are free to either ignore him or to take advantage of him, but it will be disastrous if you fall under his influence.  Indeed, if you aren't certain that you understand and can value your business far better than Mr. Market, you don't belong in the game.  As they say in poker, "If
you've been in the game 30 minutes and you don't know who the patsy is, you're the patsy."

     Ben's Mr. Market allegory may seem out-of-date in today's investment world, in which most professionals and academicians talk of efficient markets, dynamic hedging and betas.  Their interest in such matters is understandable, since techniques shrouded in mystery clearly have value to the purveyor of
investment advice.  After all, what witch doctor has ever achieved fame and fortune by simply advising "Take two aspirins"?

     The value of market esoterica to the consumer of investment advice is a different story.  In my opinion, investment success will not be produced by arcane formulae, computer programs or signals flashed by the price behavior of stocks and markets.  Rather an investor will succeed by coupling good business
judgment with an ability to insulate his thoughts and behavior from the super-contagious emotions that swirl about the marketplace.  In my own efforts to stay insulated, I have found it highly useful to keep Ben's Mr. Market concept firmly in mind.

     Following Ben's teachings, Charlie and I let our marketable equities tell us by their operating results - not by their daily, or even yearly, price quotations - whether our investments are successful.  The market may ignore business success for a while, but eventually will confirm it.  As Ben said: "In the short run,
the market is a voting machine but in the long run it is a weighing machine." The speed at which a business's success is recognized, furthermore, is not that important as long as the company's intrinsic value is increasing at a satisfactory rate.  In fact, delayed recognition can be an advantage: It may give us the chance to buy more of a good thing at a bargain price.
(
1987 Chairman’s Letter [CTRL-F] Key Word: Mr. Market)



Ben Graham Tribute:  

On December 6, 1994, we attended a session at the New York Society of Financial Analysts entitled "A Tribute to Ben Graham". Ben Graham would have been celebrating his 100th birthday if he had been alive. Three of Graham's former students spoke at length: Warren Buffett, Irving Kahn, and Walter Schloss, all very successful investors with Buffett obviously being the best known of the three.

Buffett presented the basics of Graham's investment philosophy in a simple way:

"This is the 100th anniversary of Ben's birth, I believe. And on the creative side, if what I consider his three basic ideas are really ground into your intellectual framework, I don't see how you can help but do reasonably well in stocks.

His three basic ideas - and none of them are complicated or require any mathematical talent or anything of the sort - are:

1. that you should look at stocks as part ownership of a business,

2. that you should look at market fluctuations in terms of his "Mr. Market" example and make them your friend rather than your enemy by essentially profiting from folly rather than participating in it, and finally,

3. the three most important words in investing are "margin of safety" - which Ben talked about in his last chapter of The Intelligent Investor - always building a 15,000 pound bridge if you're going to be driving 10,000 pound trucks across it.

I think those three ideas 100 years from now will still be regarded as the threecornerstones,essentially, of sound investment. And that's what Ben was all about. He wasn't about brilliant investing. He wasn't about fads or fashion. He was about sound investing.

And what's nice is that sound investing can make you very wealthy if you're not in too big a hurry. And it never makes you poor - which is even better.

So I think that it comes down to those ideas - although they sound so simple and commonplace that it kind of seems like a waste to go to school and get a Ph.D. in Economics and have it all come back to that. It's a little like spending eight years in divinity school and having somebody tell you that the ten commandments were all that counted.

There is a certain natural tendency to overlook anything that simple and important. But those are the important ideas. And they will still be the important ideas 100 years from now. And we will owe them to Ben..."
http://www.burgundy-asset.com/jun-95.asp